Super Smash Bros. (series)

Super Smash Bros. (大乱闘スマッシュブラザーズ) is a series of crossover fighting games published by Nintendo, featuring characters from franchises established on Nintendo systems. The Rhythm Heaven Series has made minor appearances in these games.

Super Smash Bros. Brawl
Rhythm Tengoku is mentioned among the titles listed in the Chronicle in Dairantou Smash Bros. X. However, no other content from the series is featured anywhere else in the game.

Super Smash Bros. for Nintendo 3DS
Sneaky Spirits appear as a common enemy in Smash Run in Super Smash Bros. for Nintendo 3DS. They move just like they did in the original game, by popping up and down in the ground, moving toward the player slowly, then jumping back to do it again. The popping can damage a player. Since they hide often and move quickly, hitting them can be difficult. However, they are weak otherwise, and managing to hit them enough sends them flying off, dropping a rare star boost, which ups all the stats of the player's character.

Three characters appear as trophies in the "Other" category:

Super Smash Bros. for Wii U
Two songs from the series are included in Super Smash Bros. for Wii U: Blue Birds from Rhythm Heaven, and Monkey Watch (with the high-five sound effects mixed in and a seamless loop) from Rhythm Heaven Fever. These songs are playable on the Miiverse stage.

Additionally, a blank series emblem for a Rhythm Heaven character exists in the data for this game, but goes unused. This is oddly absent from Super Smash Bros. for Nintendo 3DS.

Two characters appear as trophies in the "Other" category:

Super Smash Bros. Ultimate
The music used in Super Smash Bros. for Wii U returns, along with Fruit Basket, this time playing on the Summit, Hannenbow, Balloon Fight, Living Room, Find Mii, Tomodachi Life, Pictochat 2, Duck Hunt, Wrecking Crew, Pilotwings and Wuhu Island stages, i.e., stages in the "Other" category.

Several characters appear as Spirits. The Rhythm Heaven Series holds the distinction for having the most Spirits out of any non-fighter-represented series.