The phrase is closely associated with Pokémon and the long-running anime character Ash Ketchum calling out Pikachu before battle. Online, the clip spread beyond anime fandom because the wording is instantly recognizable, easy to parody and perfect for selection jokes. Creators still use it for edits about choosing a favorite person, character, product or team, especially when they want a nostalgic early-2000s cartoon feel. Its staying power comes from how short, clear and universally understandable the setup is, even for casual viewers.