Dumb blog

Mario & Luigi: Bowser's Inside Story + Bowser Jr.'s Journey contains an unused "spinning Goomba test" room in its files. The room contains 5 motionless Goombas (4 of which can be seen in the screenshot) and 1 rapidly spinning one.

The motionless Goombas can only be stood on. The spinning Goomba is immaterial and cannot be interacted with in any manner.

Top: in Super Mario 64, the third mission of Hazy Maze Cave is called "Metal-Head Mario Can Move!"

Bottom: when the character who has the Metal Cap ability was changed from Mario to Wario in Super Mario 64 DS, the mission was renamed to "Metal-Head Wario Can Move" without an exclamation point.

Note that this is the only mission in the game that lost the exclamation point; others like "Shocking Arrow Lifts!" or "Quick Race Through Downtown!" still retain them in Super Mario 64 DS.

This makes it look as though the game considers Wario being able to move in metallic form to be objectively less exciting than if it were Mario instead.