The three red, yellow, and green Kirbys represent the Tomatrio, a trio of red, yellow, and green tomatoes.
The stage represents the Ketchup Kingdom, the main setting of Tomato Adventure which takes place on a large island similar to Super Mario World 2: Yoshi's Island.
The music track represents the battle theme of the Mario & Luigi series, which serves as the spiritual successor of Tomato Adventure developed by AlphaDream.
The Maxim Tomato item references how Tomato Adventure is centered around the theme of tomatoes.
Other trivia:
This spirit's Support type references the Tomatrio's role in Tomato Adventure as DeMille's guide.
This spirit's Attack type and Star Rod Equipped ability reference the Super Cara-Cooker, a weapon used by the antagonistic King Abira which can shoot star-shaped beams.
This spirit is featured in the Beedle's Tent shop, which sells spirits related to living creatures, referencing how the Tomatrio are sentient tomatoes.
