In Pokemon: The First Movie - Mewtwo Strikes Back ... After the death of Maria, the human girl he was raised with, Shadow ...

with Wes purifying shadow Pokemon with a snag machine. In Mystery Dungeon, you uncover mysteries like fallen trainers and sinister Pokemon, deciding to stay or return to human form. Pokemon has ...

Primal Groudon and Mega Garchomp (as well as Shadow Mewtwo). However, if you don't have these then your strongest Psychic-type, Ground-type, or Water-type will do as it's weak to these.