why is it even called psycho killer? nothing differentiates it from the bulky attacker, not psystrike, not calm mind, except its offensive nature. i understand if it's some sort informal standard, but logically it should juts be called 'offensive'
Aura Sphere / Fire Blast
Calm Mind / Recover
IMO. Ice Beam should always be used because it hits so many things super effectively.
bulky attacker should be
Recover / Substitute / Taunt
Ice Beam / Aura Sphere / Fire Blast
bulky mewtwo should definitely be boosting, calm mind is non-negoatiable. third slot is the accompaniment move to CM, allowing cm + recover, cm + sub, cm + taunt
last move is auxiliary coverage
phys.def ho-oh can take any attack from +1 mewtwo and attempt to burn it (except thunder)
ok choice scarf looks situational, but cool to have a super fast scarfer