Compared to Kang Roo, Zang Roo has area attack, slightly increased attack rate, range and significantly higher stats, as well as the usual Zombie abilities - burrowing and respawning. It is recommended to 'waste' one of her burrow abilities by either knocking back or killing her before she burrows, timing right the Cat Cannon cannon so that it hits her right before she burrows, or tricking her into burrowing underneath a weak cat, away from your other cats. Like Zory, Zang Roo respawns at full health, one time. Never underestimate 2 of her in Multiversal Studios or 30 of her in Lovechild Lane.
After 50 years as a boxer, her body just couldn't handle the doping anymore. Still, chemicals were effective enough to keep her body punching even after death.
Kangaroo boxer keeps the power as much as possible by doing doping. The other day, rumor that gloves' discrimination ceased to have put an end to the boxer's life in 1956.