The Animal (2001)

Wimpy Marvin doesn't have what it takes to fulfill his lifelong dream of becoming a cop. But his luck changes when he's critically injured in a car accident and a deranged scientist secretly uses animal organs to rebuild him. Energized by his new parts, Marvin leaves his weakness behind and achieves instant fame as a supercop. Life is good to Marvin, until his animal instincts start taking over his body and threaten his relationship with his new love, Rianna.