Mirror Ash is shown to be the exact opposite of Ash as he is cowardly and a crybaby, which he is often called by Mirror Serena. He ran away, after a battle with Mirror Serena and encountered Ash, taking his Pikachu. However, Mirror Ash missed his Mirror Pikachu, who ran away and was captured by Team Rocket. Ash united forces and defeated Team Rocket, rescuing Mirror Ash's Pikachu, teaching him to have more confidence in his own abilities. Mirror Ash and his friends took Ash back to the mirror rock and saw their counterparts. After Ash got pulled, the mirror counterparts bid farewell, hoping to meet them again.
He is shown to be Mirror Ash's main Pokémon and is the opposite of Ash's Pikachu since he is very aggressive and mean.