Sentry (kayleerocha's bloonverse)

The sentry shoots bullets that each pops 1 layer but can pierce through 8 bloons. It costs $500 and has 20HP

Longer Barrels
Price: $350

Increases the range of the sentry

Explosive Bullets
price: $750

Bullets explode when it hits a bloon dealing 2 damage to any nearby bloons

Red Hot Plasma
price: $3235

Replaces the bullets with plasma that deals 3 damage. Can pop almost every kind of bloons.

Operation U. B. I. P.
price: $13370

The sentry shoots plasma very fast. Each burst of plasma deals 5 damage to every bloon in its path.