Pikachu Libre is the only pikachu with a black tip on his tail! :O

Pokemon 6026 Shiny Pikachu Belle Pokedex: Evolution, Moves, Location, Stats

Pokemon 4025 Pikachu Rockstar Pokedex: Evolution, Moves, Location, Stats

Pikachu has no black on his tail circa 1998 : r/Retconned

Pokemon 4027 Pikachu Popstar Pokedex: Evolution, Moves, Location, Stats

Sabi96 Papercraft Box: Pikachu Libre (Pokemon)

Pikachu's Black Tail and the Mandela Effect

Explore the Best Pikachulibre Art

Pikachu (SSBU) - SmashWiki, the Super Smash Bros. wiki

What happened to the black fur at the end of Pikachu's tail? - Quora

Pokemon's Black Tail Pikachu Mandela Effect Explained