Pokemon Season 5 - Episode 229 – An EGG-sighting Adventure!

Ash wins an egg as a prize for the race, and wonders what it will hatch into. Using a Pokémon Centre as a motel, Ash leaves the egg on a desk. Team Rocket attempts to steal the egg, but Togepi wakes up, and she teleports the egg away. The next morning, Ash has to find out who stole his egg.