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I suggest Reuniclus, Blissey, or Chansey with eviolite. But I love my x-Cell (Reuniclus) he seems to take everything lol. I thought the double switch from stark to Amaterasu would catch you off guard
Actually I played Okami on the ps2 when it 1st came out not realizing the dogs name was Amaterasu bt actually I got the name from Naruto Shippuden... the black flame, Amaterasu and I thought that was perfect for Chandelure