At the Pokémon Center, Ash asks Professor Oak to transfer him his Snorlax due to only Pokémon weighing at least 80 kilograms being allowed to enter the competition. Since Ash has six Pokémon in his team, he transfers his Noctowl to Professor Oak so that he can research its unusual rare coloring. At the registration area, a disguised Team Rocket enters Wobbuffet, disguised as a Miltank nicknamed “Milky”, into the competition. James and Meowth are concerned about Jessie’s plan of entering her Wobbuffet since he’s a light-weight Pokémon, but Jessie tells them not to worry, as she has already planned everything out. Meanwhile, Ash manages to get his Snorlax registered into the competition, being the last person to enter, with Snorlax’s weight breaking the weigh-in scale. Snorlax is fast asleep, even missing the opening ceremony. However, as Shonosuke announces the prize, which includes the King’s Rock and a one-year supply of Pokémon food, Snorlax finally wakes up when it hears about the food prize.
(Source: Bulbapedia)