Pikachu and some of the other pokemon camp out in the woods and help the Pichu brothers get on the train.
Pokemon: Pikachu no Summer Bridge Story
Pokemon Movie 01: Mewtwo no Gyakushuu
Pokemon Movie 23: Koko
Pokemon de Manabi, Asobu
Pokemon: Pikachu Koori no Daibouken
Pokemon 3D Adventure 2: Pikachu no Kaitei Daibouken
Pokemon Movie 08: Mew to Hadou no Yuusha Lucario
Toho Cinemas x Pokemon Go
Pokemon Diamond & Pearl Specials
Pokemon Movie 15: Kyurem vs. Seikenshi
Pokemon: Senritsu no Mirage Pokemon
Pokemon Fushigi no Dungeon: Magnagate to Mugendai Meikyuu
Pokemon Ranger: Hikari no Kiseki
Pokemon Crystal: Raikou Ikazuchi no Densetsu
Pokemon: Pikachu no Wanpaku Island