Their main ability lies in becoming corrupted in bloodmoons, where all of their stats increase dramatically, and they take on a purple color equal to that of a regular corrupt bunny. This coloring can be replicated with Shadow Armor, as well. Bunnies are also the smallest playable race in the mod, being a mere 1x2 blocks tall, capable of fitting into most, if not all passages, and allowing them to make living space out of spare room in the homes of other players, for example. Unfortunately, there is a bug with bunnies that causes them to become invisible when wearing hardmode armor, due to a lack of sprites for it.
Bunnies are playable as of the latest version of Nterraria, but can fall through floors when jumping in small spaces, and are incapable of using shortswords properly.