This sound is from Undertale Sound Effects

Super Smash Bros. from Nintendo, launched in 1999, features 89 characters from different franchises. There are also other non-player characters that take the form of enemies, bosses, and power-ups. The fighting game series is mostly sourced from Nintendo franchises but with a number of third-party ones as well.
See also: Omori (video game), FL Studio, Skeleton (undead), Yume Nikki, 2021 in video games.