Bu-bu

Bu-bu is a robot created by Doctor Eggman. It serves as an enemy in Sonic Advance 3 and only appears in Toy Kingdom.

Attack Pattern
While it doesn't have any attacks that directly damage the player, if the player loses Rings while near this enemy, all of the lost Rings will be absorbed into the piggy bank which will be impossible to regain if the player doesn't destroy Bu-bu fast enough.