fire and maybe some others but mainly fire
Ice, Dragon, and Fairy
Dark, Ghost and Bug (such as Umbreon, Spiritomb, Shadow Ball, Silver Wind) are super effective Pokémon or Pokémon attacks against Mewtwo.
Kricketot is a Bug type pokemon.
There isn't a legendary Pokemon That is fire and Bug but there is Reshiram and Victini
One Pokemon that can learn Bug Bite is Wurmple.
Fire, Bug, Ice, Poison, Flying
Ice, Dragon, and Fairy
Fire is super effective against grass, bug, ice, and steel.
wigglytuff is a phsicyc so you should use a dark type pokemon with dark moves so they could be efective or a bug type move but i beat him with my squirtle and bulbasaur
Dark, Ghost and Bug (such as Umbreon, Spiritomb, Shadow Ball, Silver Wind) are super effective Pokémon or Pokémon attacks against Mewtwo.
Kricketot is a Bug type pokemon.
Any unevolved bug type pokemon.
There isn't a legendary Pokemon That is fire and Bug but there is Reshiram and Victini
The Pokemon that are weak to bug Pokemon are Pokemon that are the grass, poison, or psychic type.
Skorupi is a Poison/Bug-type Pokemon.
One Pokemon that can learn Bug Bite is Wurmple.
No Pokemon is completely "Immune" from bug types. However, Fire, Fighting, Poison and steel type Pokemon have a resistance to bug type moves.