Waluigi is Nintendo's tall, mischievous rival to Luigi, first introduced as a tennis partner for Wario in Mario Tennis. His exaggerated voice, provided in later Mario sports and party games by Charles Martinet, made his grunts, laughs and hurt reactions instantly recognisable to players. Short clips of those reactions spread through YouTube memes, TikTok edits and soundboards, where a single pained yelp became shorthand for comic failure. Because the character is both a villain and a perennial underdog, the sound still works as a quick, familiar punchline for losing moments.