Why did Rhydon get an orphan...
Rhydon deez nuts!
Rhydon Deez Nuts
Explanation
Explain Bear
Alright listen up, you cotton-headed ninny muggins! The joke is a play on words. It sets up a question about Rhydon (a Pokémon), and then the answer is a "deez nuts" joke. "Rhydon deez nuts" sounds like "Ride on deez nuts".