Dr. Hare

Dr. Hare is the villian of 24 Carrot Island. He is responsible for the disappearances of some Poptropicans, whom of which he has hypnotized with special helmets. He has stolen all of 24 Carrot Island's carrots, which are the island's main economic income, thus making the island's economic status go to an all-time low.

He plans to use a giant robotic rabbit to do mind control from space. Once you get to the controls to the robot, you must fly the robot into asteroids until it breaks down. It is unknown what stealing the carrots has to do with the plan.

Dr. Hare is apparently a rabbit fan, as he always wears a pink bunny suit and has buck teeth. He also wears green goggles.

In fact, it is entirely possible he IS a rabbit, because that might be why he stole all those carrots.