>>42896411You said you need Marshadow to beat Mewtwo, which is false.
Spectral Shadow can't carry against Mewtwo who is either spamming Calm Mind or Nasty plot and even if you remove that, Marshadow gets deleted by psychic and then it buffs again PLUS you're down a life. If or When Mewtwo focuses on you, you are 100% going to get KO'd.
Please refer to this Anon :
>>42896042