Just one, but it takes him 20 episodes.
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Just two, as long as they can find a way in.
No one knows they never keep the house!
One, but you can be sure a whole Reddit community will appear to expand the joke, make it funnier and eventually run it into the ground.
20 Episodes and Krillin dies.
Me: I'm 20 Them: Oh, when i was your age i was 21
Just one. But it takes 20 episodes