Mewtwo 1

Mewtwo 1 is a main antagonist.

Debut
He helps Serena until him and the other mewtwo summon Emolga to attck Serena, framing her and saying that she killed Landorus when Chansey did.

Escape From Emolga
Mewtwo watches Emolga try to kill Serena along with the other Mewtwo.

Plan Saga
In the Plan the Mewtwos team up with Serena, and Fire Dude. After that they become enemies again.

Baby Mew
Unknown Pokemon tries to use magic to turn the mewtwos into mews. He fails and they retreat.

Positive Redstone
The two Mewtwos help Serena fix redstone Wizzro destroyed. They became enemies again.

Minty Muncher
Everyone teams up to flee from Minty Muncher.

Strongest
The Mewtwos become stronger than ever.

Showdown
Mewtwo 1 and Mewtwo 2 fight Dark Lugia.