dragon and ice is most efective against dragon.
Grass and Electric moves
Dark, Ghost and Bug (such as Umbreon, Spiritomb, Shadow Ball, Silver Wind) are super effective Pokémon or Pokémon attacks against Mewtwo.
Ice, Dragon, and Fairy
Flying and Psychic are super effective against fighting
fire and fight
Fire is super effective against grass, bug, ice, and steel.
dragon and ice is most efective against dragon.
Grass and Electric moves
Dark, Ghost and Bug (such as Umbreon, Spiritomb, Shadow Ball, Silver Wind) are super effective Pokémon or Pokémon attacks against Mewtwo.
Ice, Dragon, and Fairy
Fire, Bug, Ice, Poison, Flying
Listen, mawhile is not in soul silver nor heart gold you can only get one in ruby, sapphire, and emerald
You cannot catch Mawhile in Sapphire. You must trade it from Ruby/Emerald.
maybe kyorgre with hydro pump and it will be super efective ps. i an trade on diamond around 1:00-10:00
Yes.
it was not very efective