June 23, 2005
Chibi-Robo! features some little references to the Mario series, specifically:
- During the day, the clock on the upper left corner of the screen shows a sun. This is actually the same as the life meter from Super Mario Sunshine, only mirrored and rotated. During the night it shows a moon designed in the same style.
- The Princess Pitts character is likely based on Princess Peach, given the similar name, appearance and role, since they both are damsels in distress.
Okaeri! Chibi-Robo! Happy Richie Osoji!
July 23, 2009
the Power Star from the Mario series appears in the game as a collectable item.
Super Mario Maker
September 10, 2015
One of the unlockable costumes that Mario can wear in the game by using a Mystery Mushroom is based on Chibi-Robo, and it's unlocked in the 100 Mario Challenge mode or alternatively by using the Chibi-Robo amiibo. When worn it replaces the sound effects with sounds from the original Chibi-Robo!.
Copyrights for both series are held by Nintendo.