Monkey Knowledge (BTD6)

For the mechanic in Bloons Monkey City, see Monkey Knowledge (BMC).

Monkey Knowledge (MK for short) is an enhancement system in Bloons TD 6. Starting at level 30, players can invest Monkey Money and Monkey Knowledge Points into one of six skill trees to unlock permanent enhancements. Most are enhancements to specific towers and upgrades, but some alter the fundamentals of the game itself, such as reducing the health of all MOAB-Class Bloons. Players can choose to disable all their active Monkey Knowledge and enable it again for no cost. Additionally, players can pay 2000 Monkey Money for a respec to re-invest their Monkey Knowledge Points into different trees. It is not required repay Monkey Money to unlock previously unlocked Monkey Knowledge.

Terminology

• "Monkey Knowledge" is both the term for the system as a whole and a term for the nodes that unlock perks. The nodes have also been called "Monkey Knowledge upgrades" and "Knowledge types" to distinguish them from the system.
• "Monkey Knowledge Points" are the currency used to unlock Monkey Knowledge upgrades. This term has also been used for the upgrades themselves on at least one occasion.

Mechanics

Tiers

Monkey Knowledge trees are split into six tiers; upgrades lower on the tree are of higher tiers. Tiers 3 and above require a certain number of Monkey Knowledge Points to be invested into the tree before they can be unlocked, and tiers 4 and above cost Monkey Money when purchased for the first time.

Tier	Primary	Military	Magic	Support	Heroes	Powers
3	×5	×4	×4	×3	×3	×3
4	×8 250	×8 250	×4 250	×3 250	×3 250	×3 250
5	×10 500	×8 500	×8 500	×8 500	×8 500	×3 500
6+	×10 1,000	×14 1,000	×8 1,000	×14 1,000	×8 1,000	×10 1,000

Respec

The Respec option cost  2,000 Monkey Money. It removes all Monkey Knowledge Points the player has invested into all Monkey Knowledge trees and refunds them. Any Monkey Money spent on Monkey Knowledge upgrades will remain, so they will only require a Knowledge Point and not cost any Monkey Money the next time the player unlocks them.

In-app purchases

Monkey Knowledge can be unlocked early by purchasing Knowledge Unlocked from the Shop. This option does not exist in Bloons TD 6+ or Bloons TD 6 NETFLIX due to the removal of the Shop.

Icon	Name / description	Introduced
	Knowledge Unlocked Unlock the secrets of Monkey Knowledge! Instantly rank up to Rank 30 and also get 5 Bonus Knowledge Points!	Launch

List of Monkey Knowledge

Monkey Knowledge	Cost	Prerequisites	Introduced
Extra Dart Pops Dart Monkeys get +1 pierce to all shots.	Free	—	Launch
Fast Tack Attacks Tack Shooter attack speed increased by 8%.	Free	—	Launch
Increased Lifespan Longer projectile lifespan for Dart Monkey, Bomb Shooter, Tack Shooter and Glue Gunner.	Free	—	Launch
Cheap 'Rangs Base cost of Boomerang Thrower[sic] reduced by 50.	Free	Increased Lifespan	Launch
Crossbow Reach Crossbow range increased.	Free	Extra Dart Pops	Launch
Fast Glue Glue Gunner 10% increased attack speed.	Free	Fast Tack Attacks	Launch
Fraggy Frags Frag bombs get 2 extra frags.	Free	Increased Lifespan	Launch
Hard Tacks Tack Shooter tacks can pop Frozen Bloons.	Free	Fast Tack Attacks	Launch
Poppy Blades Blade Shooter upgrade gets +2 pierce.	Free	Hard Tacks	Launch
4 and 4 Dart Monkey's triple shot gets 4 darts every 4th shot.	Free	5 invested Crossbow Reach	Launch
Big Inferno Inferno Ring upgrade gets +3 burst radius.	Free	5 invested Poppy Blades	Launch
Budget Clusters Bomb Shooter's Cluster Bombs cost reduced by 100.	Free	5 invested Fraggy Frags	Launch
Extra Bounce Increases Boomerang Ricochet pierce by 30.	Free	5 invested Cheap 'Rangs	Launch
Force vs Force Juggernaut does +2 damage per shot to MOAB-Class Bloons.	Free	5 invested Crossbow Reach	Launch
Icy Chill Freeze radius slightly increased.	Free	5 invested Hard Tacks	Launch
More Splatty Glue Glue Splatter can affect 2 extra Bloons per shot.	Free	5 invested Fast Glue	Launch
Recurring 'Rangs Boomerangs that return to the Boomerang Monkey will be thrown a second time.	Free	5 invested Extra Bounce	Version 22.0
Aviation Grade Glue MOAB Glue slows more than normal.	250	8 invested More Splatty Glue	Launch
Hard Press MOAB Press pushes back 30% further.	250	8 invested Extra Bounce	Launch
Master Double Cross Allows you to have TWO Crossbow Masters.	250	8 invested 4 and 4	Launch
Mega Mauler MOAB Mauler does more damage per hit.	250	8 invested Aviation Grade Glue Hard Press	Launch
So... Cold... Ice Monkey's Permafrost upgrade slows by 60%.	250	8 invested Icy Chill	Launch
Big Cryo Blast Cryo Cannon gets increased blast radius.	500	10 invested So... Cold...	Launch
Bionic Augmentation While Turbo Charge is active, Bionic Boomerang is able to target Camo Bloons.	500	10 invested Long Turbo	Version 30.0
Cheaper Solution Bloon Liquefier cost reduced by 1000.	500	10 invested Aviation Grade Glue	Launch
Come On Everybody! Primary towers attack 5% faster if all are below tier 3, and cost 5% less if all are tier 3 or 4.	500	10 invested Master Double Cross	Version 15.0
Hypothermia Snowstorm freezes Bloons for longer.	500	10 invested So... Cold...	Launch
Long Turbo Boomerang Turbo Charge ability lasts 15 seconds.	500	10 invested Hard Press	Launch
Violent Impact Bomb Shooter's Bloon Impact stuns for 25% longer.	500	10 invested Budget Clusters	Launch
Bonus Glue Gunner Start each game with 1 free Glue Gunner! (Only 1 free Monkey Tower per game)	1,000	10 invested Cheaper Solution	Version 30.0
Bonus Monkey! Start each game with 1 free Dart Monkey! (Only 1 free Monkey Tower per game)	1,000	10 invested Come On Everybody!	Launch
More Cash Increase starting cash by 200.	1,000	10 invested Bonus Glue Gunner Bonus Monkey!	Launch
Airforce Upgrades Monkey Aces and Heli Pilots of Tier 3 or higher get +1 pierce per shot.	Free	—	Launch
Elite Military Training All Military Monkeys get a one-off +1000xp and earn xp in-game 5% faster permanently.	Free	—	Launch
Emergency Unlock Activated ability: unlocks locked Dartling Gunners and boosts their swivel speed for a short time.	Free	—	Version 22.0
Naval Upgrades Monkey Buccaneer and Monkey Sub get +1 pierce per shot.	Free	—	Launch
Accelerated Aerodarts Darts from Monkey Aces fly faster.	Free	Airforce Upgrades	Launch
Big Bunch Grape Shot shoots 6 grapes.	Free	Naval Upgrades	Launch
Ceramic Shock Sniper hits on Ceramic Bloons slow them down briefly.	Free	Elite Military Training	Launch
Breaking Ballistic Ballistic Missiles do more damage to Ceramic Bloons.	Free	4 invested Naval Upgrades	Launch
Cheaper Maiming Maim MOAB cost reduced by 1000.	Free	4 invested Ceramic Shock	Launch
Extra Burny Stuff Burny Stuff pops every second.	Free	4 invested	Version 6.0
Faster Takedowns MOAB Takedown Ability has 5 second faster cooldown.	Free	4 invested Big Bunch	Launch
Gorgon Storm Hydra Rocket Storm stuns damaged Bloons for a short time.	Free	4 invested Emergency Unlock	Version 22.0
Rapid Razors Razor Rotors pop Bloons faster.	Free	4 invested Airforce Upgrades	Launch
Targeted Pineapples Pineapples are only dropped near tracks.	Free	4 invested Accelerated Aerodarts	Launch
Cross the Streams Where Plasma or Doom beams cross on the track they create temporary plasma pools.	250	8 invested Gorgon Storm	Version 22.0
Gun Coolant Monkey Aces attack 10% faster.	250	8 invested Targeted Pineapples	Launch
Paint Stripper Mortar shattering shells removes Fortification from DDT Bloons.	250	8 invested Extra Burny Stuff	Version 6.0
Quad Burst Airburst Darts split into 4 instead of 3.	250	8 invested Breaking Ballistic	Launch
Trade Agreements Merchantman generates +$20 per round.	250	8 invested Faster Takedowns	Launch
Aeronautic Subsidy Monkey Ace tier 5 upgrades cost 10% less.	500	8 invested Gun Coolant	Launch
Budget Battery Artillery Battery cost reduced by 600.	500	8 invested Paint Stripper	Version 6.0
Charged Chinooks Chinook Activated Abilities give 25% more lives and cash.	500	8 invested Rapid Razors	Launch
Flanking Maneuvers Sniper, Monkey Sub, & Monkey Buccaneer attack 10% faster when set to 'Last' targeting priority.	500	8 invested Quad Burst Trade Agreements	Version 22.0
Master Defender Elite Defender has no cooldown.	500	8 invested Cheaper Maiming	Launch
Wingmonkey Advanced flight pathing that coordinates multiple Monkey Aces on staggered attack runs.	500	8 invested Aeronautic Subsidy	Version 15.0
Advanced Logistics All Military Monkeys base costs reduced by 5%.	1,000	14 invested Aeronautic Subsidy Door Gunner	Launch
Big Bloon Sabotage All MOAB-Class Bloons spawn in a partially damaged state.	1,000	14 invested Sub Admiral Master Defender	Launch
Door Gunner Special Poperations Heli allows tier 4 and below Monkey Towers to attack Bloons while in transit.	1,000	14 invested Charged Chinooks	Version 17.0
Military Conscription Purchase price of first Military Monkey each game is two thirds the normal.	1,000	14 invested Trade Agreements	Launch
Sub Admiral Sub Commander affects all Monkey Subs on screen.	1,000	14 invested Flanking Maneuvers	Launch
Lingering Magic Longer projectile lifespan for Wizard Monkey, Super Monkey, Ninja Monkey, and Druid.	Free	—	Launch
Magic Tricks Guided Magic and Intense Magic cost 25 less.	Free	—	Launch
SUPER Range Increased range for the Super Range upgrade.	Free	—	Launch
Cheaper Doubles Ninja Double Shot cost reduced by 100.	Free	SUPER Range	Launch
Heavy Knockback Bloons hit by Knockback from Super Monkey are knocked back slightly harder.	Free	SUPER Range	Launch
Hot Magic All Magic type towers can pop Frozen Bloons.	Free	Lingering Magic	Launch
Mo' Monkey Money Earn 10% extra Monkey Money from game wins on any difficulty.	Free	Speedy Brewing	Launch
Speedy Brewing All Alchemist's potions have 5% faster reload time.	Free	Magic Tricks	Launch
Diversion Tactics Increased chance to distract Bloons from Distraction upgrade.	Free	4 invested Cheaper Doubles	Launch
Flame Jet Dragon's Breath flame projectiles move much faster.	Free	4 invested Magic Tricks Hot Magic	Launch
Strike Down the False Sun Avatar can pop Purple Bloons.	Free	4 invested Heavy Knockback	Launch
Strong Tonic Transforming Tonic lasts longer.	Free	4 invested Speedy Brewing	Launch
Warm Oak Heart of Oak cost reduced by 100.	Free	4 invested Hot Magic	Launch
Acid Stability Alchemists' acid pools last 5 seconds longer.	250	4 invested Strong Tonic	Launch
Arcane Impale Arcane Spike does extra damage to MOAB-Class and Ceramic Bloons.	250	4 invested Flame Jet	Launch
Cold Front Ball Lightning's additional lightning bolts also freeze Bloons.	250	4 invested Warm Oak	Launch
X-ray Ultra Ultravision allows Super Monkeys to see through and fire through blocking objects.	250	4 invested Strike Down the False	Version 30.0
Deadly Tranquility Bloonjitsu and Grandmaster Ninja get an extra shuriken per throw.	500	8 invested Diversion Tactics	Launch
There Can Be Only One There can be only one.	500	8 invested X-ray Ultra	Version 3.0
Vine Rupture Grants Spirit of the Forest Druid a new ability to burst all track vines, doing big damage to all non-Lead Bloons. New vines will regrow after each Rupture.	500	8 invested Cold Front	Version 17.0
Mana Shield Creates a special shield that absorbs up to 25 lives for free. Recharges slowly each round if no Bloons leak.	1,000	8 invested Arcane Impale	Launch
Tiny Tornadoes Druid tornadoes spawn 3 smaller tornadoes when they expire.	1,000	8 invested Deadly Tranquility Cold Front Vine Rupture	Version 15.0
Flat Pack Buildings Farm and Village cost 2% less and sell for 2% more.	Free	—	Launch
One More Spike Spike Factory stacks get +1 spike.	Free	—	Launch
First Last Line of Defense Purchase price of first Spike Factory each game is $150 less.	Free	One More Spike	Version 22.0
Insider Trades Monkey Business discount increases by 2%.	Free	Flat Pack Buildings	Launch
More Valuable Bananas Valuable Bananas upgrade increases to 30%.	Free	Flat Pack Buildings	Launch
Bigger Banks Monkey Banks can hold 2500 extra money.	Free	3 invested Insider Trades	Launch
Farm Subsidy First Banana Farm each game costs 100 less.	Free	3 invested More Valuable Bananas	Launch
Monkey Education All Monkeys XP earn rate increased by 8%.	Free	3 invested	Launch
Vigilant Sentries Sentry Turrets last longer than normal.	Free	3 invested One More Spike	Version 12.0
Backroom Deals IMF Loan grants $1000 more and repay rate is 40%.	250	3 invested Bigger Banks	Launch
Inland Revenue Streams Monkey Town cash bonus increased by 10%.	250	3 invested Farm Subsidy	Launch
Thicker Foams Cleansing Foam can hit 3 more Bloons before expiring.	250	3 invested Vigilant Sentries	Version 12.0
To ARMS! Call to Arms duration increased by 3 seconds.	250	3 invested Monkey Education	Launch
Very Shreddy MOAB SHREDR spikes do +1 extra damage to MOAB-Class Bloons.	250	3 invested First Last Line of Defense	Launch
Better Sell Deals All Monkeys sell for 5% more.	500	8 invested Backroom Deals	Launch
Big Traps Bloon Trap can hold 30 more RBE.	500	8 invested Thicker Foams	Version 12.0
Global Ability Cooldowns All Ability cooldowns for all Monkeys reduced by 3%.	500	8 invested To ARMS!	Launch
Healthy Bananas Marketplaces now produce 1 life per round and Central Markets produce 3.	500	8 invested Inland Revenue Streams	Version 15.0
Hi-Value Mines Spiked Mines cost reduced by 1500.	500	8 invested Very Shreddy	Launch
Veteran Monkey Training All Monkeys reload time reduced by 3%.	500	8 invested To ARMS!	Launch
Bank Deposits Tier 4 and above Monkey Banks can take deposits from available in game cash.	1,000	14 invested Better Sell Deals	Version 18.0
Paragon of Power Paragons attack faster if there are no Tier 5 of the same tower.	1,000	14 invested Veteran Monkey Training	Version 39.0
Ability Discipline Hero level 10 Ability cooldowns reduced by 10%.	Free	—	Launch
Heroic Reach All heroes get slightly increased range.	Free	—	Launch
More 'Splody Heroes' explosives get +2 pierce per shot.	Free	—	Launch
Heroic Velocity All Heroes' projectile speeds increased slightly.	Free	Heroic Reach	Launch
Scholarships Hero training costs reduced by 10%.	Free	More 'Splody	Launch
Ability Mastery At level 20, Heroes' level 3 Ability cooldown reduced by 30%.	Free	3 invested Ability Discipline	Launch
Quick Hands Makes all heroes attack 4% faster.	Free	3 invested Heroic Velocity	Launch
Self Taught Heroes Heroes earn XP 10% faster.	Free	3 invested Scholarships	Launch
Hero Favors Heroes' base cost reduced by 10%.	250	3 invested Self Taught Heroes Quick Hands	Launch
Big Bloon Blueprints Heroes do +1 extra damage to MOAB-Class Bloons with their base attack.	500	8 invested Ability Mastery	Launch
Empowered Heroes Heroes start each game at level 3.	500	8 invested Hero Favors	Launch
Monkeys Together Strong Heroes receive 5% more experience per each Hero placed.	1,000	8 invested Empowered Heroes	Version 22.0
Weak Point All Heroes deal +1 damage to Ceramic & Fortified Bloons.	1,000	8 invested Monkeys Together Strong Big Bloon Blueprints	Version 15.0
Bigger Camo Trap Camo Trap lasts for 600 Bloons.	Free	—	Launch
Cheaper Lakes Portable Lake costs 40 Monkey Money.	Free	—	Launch
Just One More Road Spike piles have 21 spikes in them.	Free	—	Launch
Budget Pontoons Pontoon costs 40 Monkey Money.	Free	Cheaper Lakes	Launch
Longer Time Stop Time Stop lasts longer than normal.	Free	Just One More	Launch
Mauling MOAB Mines MOAB mine does extra damage.	Free	Bigger Camo Trap	Launch
Longer Boosts Monkey Boost lasts longer.	Free	3 invested Longer Time Stop	Launch
Powerful Monkey Storm Super Monkey Storm does more damage.	Free	3 invested Budget Pontoons Longer Boosts	Launch
Supersize Glue Trap Glue Trap can slow MOAB-Class Bloons, though the bigger the Bloon, the more glue is used up.	Free	3 invested Mauling MOAB Mines	Launch
Ambush Tech Techbot gains a targeting option to trigger only when Bloons enter a specific track area.	250	3 invested Supersize Glue Trap	Version 17.0
Fit Farmers Monkey Farmers have larger radius.	250	3 invested Powerful Monkey Storm	Launch
Pre-game Prep Start each game with a pile of permanent Road Spikes at the end of the track.	250	3 invested Longer Boosts	Launch
Budget Cash Drops Cash Drops cost 20 Monkey Money less.	500	3 invested Fit Farmers	Launch
Supa-Thrive Thrive adds 30% instead of 25%.	500	3 invested Fit Farmers	Launch
Grand Prix Spree Monkey Money cost to enter Races is reduced by 10%.	1,000	10 invested Budget Cash Drops	Version 22.0

Related achievements

See also: Monkey Knowledge Point#Achievements

	Student Apply your first Monkey Knowledge point Reward(s):  ×2,  0-0-0 Wizard Monkey

10	Scholar Apply 10 Monkey Knowledge points Reward(s):  100,  0-0-1 Druid

106	Dr. Monkey Spend 106 Monkey Knowledge points Reward(s):  1,000

	Knowledgeable Primate Unlock all Monkey Knowledge in one branch Reward(s):  3-0-0 Wizard Monkey,  ×1

Update history

Note: this section only lists changes to the Monkey Knowledge system in general, not individual Monkey Knowledge upgrades.

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Version 2.0

• Added a button to toggle Monkey Knowledge off

Version 15.0

•  Added Monkey Money costs to tier 4+ Monkey Knowledge
•  Respec confirmation text changed ― "Resets all Monkey Knowledge so you can assign all Monkey Knowledge points again." → "Resets all Monkey Knowledge so you can reassign all points. Monkey Money spent unlocking a given Knowledge remains invested there."

Version 32.0

• Big behind the scenes refactoring to Monkey Knowledge to improve load time & memory
• Bug fixes and resolutions to some minor quirks in functionality
• Current enabled Monkey Knowledge for a save game will now be locked upon creation of that game

Gallery

Screenshots

• 
  The Monkey Knowledge menu
• 
  The Primary tree
• 
  The Military tree
• 
  The Magic tree
• 
  The Support tree
• 
  The Heroes tree
• 
  The Powers tree

Assets

• 
  Primary category icon
• 
  Military category icon
• 
  Magic category icon
• 
  Support category icon
• 
  Heroes category icon
• 
  Powers category icon
• 
  Enable/disable button icon
• 
  Respec button icon

Removed content

• Ambidextrous 'Rangs: became an inherent part of the Boomerang Monkey in version 22.0. Its slot on the Monkey Knowledge tree was replaced with Recurring 'Rangs.

Unused content

These Monkey Knowledge upgrades have text and icons, but are not implemented. The unused Dartling Gunner Monkey Knowledge seems to predate the rework to its upgrades that happened before the tower eventually released.

Icon	Text
	Broad Blade Dartlings Shots from Dartling Guns can hit Bloons more easily.
	Dartling Coolant Dartling Gun attack speed increase by 10%.{{sic}}
	More Buckshot Buckshot shoots 5 projectiles.
	Focused Plasma Plasma Accelerator does damage faster.
	Elite Tutors Generates another +15 XP per round for your Hero.
	Long Graduation Academy Graduate lasts longer.