Pikachu's PikaBoo (2001)

Original title: ピカチュウのドキドキかくれんぼ

At a giant beachside mansion, Pikachu and some of its buddies decide to play a game of hide-and-seek. Pikachu is “it,” and it goes off in search of its friends. Meanwhile, Larvitar, sick of being all by itself, kicks a rock in anger. The rock hurtles through the air—and hits a lawnmower, turning it on and sending it tearing off after Pikachu and its friends! The group draws the lawnmower into a maze and even gets it into the water, but the lawnmower just keeps on chasing. The Pokémon build a road out of logs, hoping to get the lawnmower into a shack, but Psyduck trips and ruins the whole setup. How will the friends ever escape the lawnmower? This fantasy will have you on the edge of your seat!