pun
noun
1. a joke exploiting the different possible meanings of a word or the fact that there are words that sound alike but have different meanings.
Mario wanted to wear tighter overalls, but he was afraid he couldn't pull them off.
Did you hear about Bowser's crimes in Super Mario Bros? They were wrong on so many levels.
Mario gets his large circumference from too much pi.
Did you hear about Mario's Super Smash Bros. battle? He lost a glove, but on the other hand he was fine.