Board Thread:Questions and Answers/@comment-5135298-20160604051623/@comment-26347196-20160604123211

I really doubt that a pronunciation had to be canonical. I've seen a source before from Toby's twitter of how to pronounce Alphys. Then he ultimately says "don't care if you say diff".

So according to Toby, consider any pronunciation of Chara, be it from Character or Charmander, are both canonical.