Quote (Doyek @ Jul 17 2012 04:29pm)
there are different mechanics between the stadium version and the normal version
"General changes include:
The duration of sleep is reduced to 1-3 turns.
If a Pokémon defeats an opposing Pokémon with a recoil move, the Pokémon does not suffer recoil damage.
An immobilized Pokémon can still select an attack.
Consecutive moves such as Wrap end when the target switches out.
All status ailments and HP-draining moves have no effect against a Substitute.
If a Pokémon is fully paralyzed during the invulnerable turn of Dig or Fly, the move resets.
When a paralyzed Pokémon's Speed is modified, its Speed reduction is no longer nullified.
After a move which causes self-inflicted confusion (e.g. Thrash) ends, the game will display a message stating that the target is confused.
The variable that determines the last damage dealt is reset whenever a Pokémon switches, is fully paralyzed, or uses a two-turn attack.
Recovery moves no longer fail when the difference between a Pokémon's current and maximum HP is 255 or 511.
In the Japanese version, the stat modifiers for accuracy and evasion were changed. "
They aren't that big unless he's doing competitive battling imo (which I doubt anyone is doing today), leaving aside the Pokémon which used bugs and exploits in the GB games, the best GB Pokémon are enough to beat Stadium regardless the changes