Why is this not in CPMC? Tsuntsun Dr. Z-chan must return
Because the fabric of reality would not stand another assault from tsun-tsun Dr Z. It'd be like, um, I dunno, Superboy punching it's walls again. History would get messed up, people would come back from the dead for now reason, and you'd never be able to find your keys.
Or your wallet, but that's because I took it. >.>