Yes, it's probably been thought of before. But please, let me finish.
So anyway, I thought of an RPG, consisting of all the Nintendo universes. Here's some ideas that could easily work.
Mario Playable Characters:
-Mario
-Luigi
-Peach
-Bowser
-Toad
-Bowser Jr.
-Rosalina
Donkey Kong playable characters:
-Donkey Kong
-Diddy Kong
-Dixie Kong
-King K. Rool
Yoshi playable characters:
-Yoshi
Wario playable characters:
-Wario
Legend of Zelda playable characters:
-Link
-Zelda/Shiek
-Ganondorf/Ganon
-Impa
Metroid playable characters:
-Samus
-Ridley
-Zero Suit Samus
StarFox playable characters:
-Fox
-Falco
-Wolf
Kirby playable characters:
-Kirby
-King Dedede
-Meta Knight
-Waddle Dee
Pokemon playable characters:
-Pokemon Trainer (Venusaur | Charizard | Blastoise)
-Pikachu
-Mewtwo
-Lucario
-Greninja
Earthbound/Mother playable characters:
-Ness
-Lucas
-Ninten
-Pokey/Porky
F-Zero playable characters:
-Captain Falcon
-Samurai Goroh
Fire Emblem playable characters:
-Marth
-Roy
-Ike
-Chrom
-Robin
Kid Icarus playable characters:
-Pit
-Palutena
-Viridi
-Magnus
-Dark Pit
Pikmin playable characters:
-Olimar
Animal Crossing playable characters:
-Villager
Xenoblade playable characters:
-Shulk
Retro/Other playable characters:
-Mr. Game and Watch
-R.O.B.
-Duck Hunt
-Little Mac
3rd Party playable characters:
-Sonic
-Snake
-Mega Man
-Pac-Man
-Rayman
What are your thoughts on this? (Just to make this clear, this is NOT a Forum RPG, this is instead a Video Game idea)