Wario is Nintendo's greedy rival to Mario, first appearing in Super Mario Land 2 in 1992 before leading the Wario Land and WarioWare series. His exaggerated voice lines have long been clipped from games and cartoons for memes, with short reactions like this circulating widely on soundboards, Discord servers and short form video edits. The oh my god delivery fits the character's theatrical personality, so creators reuse it as a universal shock reaction even outside Nintendo content, where the familiar voice instantly signals comedic disbelief to anyone who grew up with the games.