Whiplash is a platformer for PS2 and Xbox, where you play as a weasel named Spanx who is chained to an indestructible rabbit named Redmond and escape an animal testing facility for a company called Genron, destroying near everything as you go and freeing all the other critters you can. You control Spanx, who uses Redmond like an indestructible bunny flail. Using Redmond to destroy a certain dollar amount's worth of stuff unlocks special content.

The wikipedia article on it can be found here: https://en.wikipedia.org/wiki/Whiplash_(video_game)

A Youtube 'gameplay' video can also be found here: https://www.youtube.com/watch?v=Uhs0_AXjgT0

I haven't played it in literal years, but I've found a few bits online. Whiplash is a game that's a bit hard to find any quality or finished playthroughs of on youtube, and harder to find content anywhere else, which is a bit of a shame. I actually thought for a while that I'd dreamed the thing up until I did a bit of digging on google and found it again. If anyone happens to be up to the task, I'd appreciate that very much.