Worst part is, Geno was originally going to be in both Brawl AND Smash 4 for real, but with Brawl Sakurai was unable to negotiate the rights with Square Enix and with Smash 4 he had trouble coming up with a moveset.
Contrary to popular belief, however, the “Forest Mushrooms” track discovered on Brawl’s disc was probably not the Forest Maze music, but rather the Toadwood Forest music from Partners in Time, owing to the spot on the disc the track was found at (next to the Gritzy Desert remix; Brawl tracks were organized on the disc based on which games they originally came from).