The game contains unused graphics from Tennis for the NES. In the Japanese version of the game, the 'Super Nostalgic Entertainment System' is a Famicom (Japanese NES), and one of the cartridges that accompany it in the game is Tennis. Given this, it's possible that graphics from Tennis (and the rest of the games) were going to be used during post-game animations.

The way that Wario takes the Form Baton is similar to a scene in Indiana Jones and the Raiders of the Lost Ark, in which Indiana Jones is chased by a boulder after taking a golden idol from its resting place in a temple.

In 9-Volt's stage, the video game store shopkeeper is shown at the end to be Satoru Iwata, Nintendo's fourth president and CEO.