Mokou is a Japanese game commentator known for emotional, high-energy playthroughs and reactions that fans frequently clip and repost. Gekkouga is the Japanese name for Greninja, the Water and Dark type Pokémon introduced in Pokémon X and Y. Clips combining a familiar commentator with a popular Pokémon tend to circulate among Japanese gaming communities as reaction audio, and this lengthy rant became shorthand for an over-the-top response. Its appeal has less to do with one specific match than with Mokou's recognisable intensity, which listeners reuse whenever a game moment deserves a wildly disproportionate reaction.