Great character! Had a fun time drifting around with the Rabbit! Here's my review:
Visuals/sprites: Not the best, but they're not bad! The back angle is very weird, the shading is a bit weird there, since you're mostly looking at the character's back, you can really notice it. Also might want to fix where the light source is coming from, it's supposed to come from the top, but here it's coming from side. (Not sure if it's supposed to come from the side but in base Srb2, it's supposed to come from the top, so idk for Srb2K) There's also a lot of banding.
Sounds/voice clips: Very nice! Fit's the character very well, mostly because the voice clips are from the character's own series.
Overall: Great! 7/10 fun character with nice sprites.