[to himself] Yes, Cell's final transformation is at last at hand. Soon, he will be the greatest adversary I have ever faced.
Vegeta, you've doomed us all.
[after becoming Perfect Cell] At last. All that I have ever imagined is now mine. I have become what no other could ever achieve. I am perfect.
[as Krillin and Trunks are punching and kicking him and it has no effect] Yes, that's right children. Have your fun.
So you want to play, huh? Very well, it's my turn. Are you ready?
These quotes come from Wikiquote's Dragon Ball Z pages and are available under the Creative Commons Attribution-ShareAlike License.