No. That is just stupid. No video game has a bathroom to do their business, just to find stuff-like in SMS, the men's bathroom had a secret leak in it.
If a game ever did something like that, then, well, only R-rated games like Vice City might have a chance at doing that(since it's like real life).
Besides, you could always say that he holds it in until you turn off your system....that's probably why my N64 kept erasing data...
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Mario likes to dance in his backwards pants!