Bloon immunity

Bloon immunity is a mechanic present in the Bloons franchise, introduced in the original Bloons Tower Defense. In Bloons TD, Bloons Supermonkey 2 and Bloons Pop!, certain types of Bloons are immune to a specific kind of damage type, are are usually countered by damage types outside of their immunity, such as a Lead Bloon being immune to sharp attacks but vulnerable to explosives.

While MOAB-Class Bloons and Boss Bloons usually only take less damage, reduced debuff effects, or simply can't be targeted by certain towers, the DDT and Dreadbloon have specified damage immunities.

Bloons TD 6 has two Heroes that can decrease a Bloon type's resistance to a given form of damage starting at a certain level without removing the immunity completely until a later level, implemented as a 50% and later 100% chance to pop the Bloon in question with an incompatible attack. Striker Jones allows every explosive tower to have a 50% chance to pop Black Bloons starting from level 5 that increases to 100% at level 19, and Silas allows every freezing tower to have a 50% chance of freezing White Bloons starting from level 5 that increases to 100% at level 13.

Bloon immunity mechanics do not appear in Bloons Card Storm despite featuring Bloons that usually sport immunities. This was intentional on the developers' part, as they found the immunity mechanic unfair when the gameplay involves a limited amount of monkeys on the playing field.

List of Bloons with immunities

Image	Bloon type	Immunity	Introduced
	Black Bloon	Explosion damage	Bloons Tower Defense
	White Bloon	Cold/frigid damage
	Frozen Bloon	Sharp damageBloons Tower Defense Bloons Tower Defense 2 Bloons Tower Defense 3 Bloons TD 4 Bloons TD 5 Bloons TD Battles Bloons Monkey City Bloons TD 6 Bloons Adventure Time TD Bloons TD Battles 2
	Lead Bloon	Sharp/coldBloons Tower Defense 2 Bloons Tower Defense 3 Bloons TD 4 Bloons TD 5 Bloons TD Battles Bloons Monkey City Bloons Supermonkey 2 Bloons TD 6 Bloons Pop! Bloons TD Battles 2/shatter/energyBloons TD 6 damage/Storm core weaponsBloons Supermonkey 2 (mobile)	Bloons Tower Defense 2
	Ceramic Bloon	Glue slowdownBloons Tower Defense 3 Bloons TD 4 Bloons TD 5 (Flash) Bloons TD Battles (Flash) Bloons Monkey City (Flash)/magic damageBloons Supermonkey 2	Bloons Tower Defense 3
	Zebra Bloon	Explosion/cold/frigid damage	Bloons TD 4
	DDT	Explosion/sharp/coldBloons Monkey City damage	Bloons Monkey City
	Dreadbloon	Sharp damage/damage from a specific tower category for each skull tierBloons TD 6
	Glass Bloon	Energy/acidBloons TD 6/plasmaBloons TD 6 damage/Storm arm weaponsBloons Supermonkey 2 (mobile)	Bloons Supermonkey 2
	Purple Bloon	Energy/frigid/plasma/fire damage	Bloons TD 6
	Dreadrock Bloon	Dreadbloon's current tower category immunity
	Ghost Bloon	Sharp/shatter/crushing/explosion damage	Bloons Adventure Time TD