The Pokémon officially classified as UBERs (Pokémon banned from standard battles) innclude, :
- Mewtwo
- Mew
But the RBY-Metagame was highly imbalaced and highly in the favour of PSYCHIC types leading to the creation on Steel and Dark; and the splitting of the SPECIAL stat in GSC. According to you: should Alakazam have been considered an UBER aswell? It's outstanding SPECIAL and SPEED and it's although small but destructive movepool was enough to sweep the rest 148 Pokémon to oblivion.
With the return of the original Stadium game on the Wii as a Virtual Console Game, it is a heated debate at this time preceeding the release of the Wii.