Rhythm Heaven Fever

Rhythm Heaven Fever is a WarioWare-esque rhythm game with walruses which started the famous memetic "pikipikipiki desu ka?" (or "Wadawadawada s'that true?", if you prefer).

Regional Differences
The American and European versions removed the "Manzai endless" minigame of the Japanese version, replacing it with a minigame from the first Japan-only GBA game.

The Manzai minigame consisted of a traditional Japanese comedic duo, the boke (who does stupid actions) and the tsukkomi (who points out the absurdity of the situation and makes exaggerated angry reactions). Here, the boke tells increasingly stupid jokes, relying heavily on puns, while the player takes the role of the tsukkomi with two buttons: one makes him say "Eh? Eh?", and the other for getting annoyed when the boke is done telling his stupid joke. The goal is to entertain an audience by picking appropriate reactions.

This was probably cut due to cultural differences, and the numerous heavy puns from the dozens of jokes used would have been a very large hassle to translate/localize.

The other minigame, "Mr. Upbeat", involves stepping over a needle in rapid succession. As the game goes on, the title character becomes quite distressed.

While the European version of Rhythm Heaven got dubbed for each language, the Wii sequel didn't have such luxury, being released fairly late in the system's lifespan. To compensate, this version added an audio language select between Japanese and English.