The Pikmin microgame is exclusive to the non-Japanese version of the game. The Pikmin microgame replaced a game based off of the Famicom Disk System game Nazo no Murasame-jō ("The Mysterious Murasame Castle"). This is likely due to the original game not being released in the west until 2014.

If you name your game "Mario Paint" then, while you are making graphics for your game, the Mario Paint theme will play.

On rare occasions, some promotional materials for WarioWare games featured Charles Martinet as Wario mentioning real world brands, contrasting how Mario games have tended to stray away from direct pop culture references in recent years. In a 2009 British commercial for WarioWare D.I.Y., Wario verbally promotes the availability of the game at the supermarket chain Tesco. Later in 2021, at the end of a promotional "takeover" event for WarioWare: Get It Together! on the Nintendo of America Twitter account, his final message before the end of the event opened with the words "Twitter stinks".