Pineapple bloons

Pineapple bloons are bloons that can damage your towers. They move along the track like a normal bloon until they can get to any fully upgraded (or highly upgraded) towers, and they thenstop and sit for three seconds, then exploding and bringing the tower with them

On the up side, they also destroy any bloons on the area at the time. They are resistent to darts, spikes, and tacks, and it takes 5 hits to crack 'em open. Once open, they release one black, one white, and a (zebra/cameo) depending on the difficulty of the level.