The red overalls Wario represents Old Man Lobber, an elderly lobster character who features a large mustache and a red color scheme.
The stage and music track represent Lobber's Cave, the first stage of Densetsu no Stafy which takes place in a cave on a small island.
The battle conditions reference both Old Man Lobber's namesake, whose name is derived from the word "lob", which is defined as the action of throwing.
Other trivia:
This spirit's Support type references Old Man Lobber's role The Legendary Starfy series by teaching Starfy learn new moves.
This spirit's Mr. Saturn Equipped ability further references Old Man Lobber's namesake, derived from the word meaning "to throw", as Mr. Saturn is a throwing item.
In World of Light, the Old Man Lobber spirit is located on the eastern islands area in the Light Realm, similar to the stage's setting.
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