The Fairly OddParents - Season 5 Episode 3 -

Cosmo tries to impress his classmates at a high school reunion by telling them that he is a self-billionaire. Meanwhile, Timmy is involved in a subplot in which he drinks too much lemonade, and needs to go to the bathroom, but at the reunion, the bathrooms can only be poofed to; therefore, Timmy cannot use the bathroom.