Manabu

Timmy is a character of the day who appeared in The Purr-Fect Hero (EP053).

When Ash and his friends arrived at Timmy's school for Kids Day, he was the only one who didn't want to play with any of their Pokémon. He explained that he only wanted to play with a Meowth, because it was the Pokémon that saved him from a Beedrill.

After being kidnapped by Team Rocket, Timmy thought that their Meowth was the same one that rescued him before. When Jessie and James discovered this, they forced Meowth to act like Timmy's friend. Unfortunately, their plan backfired when he spoke in front of Ash and the others. After leading Timmy to Team Rocket, they engaged Ash in a battle, which was interrupted by a rockslide. Just as a large boulder was about to crush Timmy and Ash, the real Meowth that Timmy befriended rescued them once again.

Timmy adopted the Meowth as his own, and told Ash that when he got older, both of them would compete in the Pokémon League.

(Source: Bulbapedia)