Beating the elite four with one pokemon
I'm looking for a pokemon obtainable in Leaf Green version that can beat the elite four (the lvl 60+ version after you do all the islands stuff). This pokemon needs to have a moveset that, when at level 100, allows it to kill every elite four opponent pokemon in one attack per pokemon while holding an amulet coin.
this moveset needs to be accomplished without the use of 1-of-a-kind TMs.
edit: I'd also prefer it was a non-legendary, non 1-of-a-kind pokemon, ie something i could breed.