Pairing: HGSS-verse Mewtwo/Kotone or whatever you want to call the female PC

Dark-ish Mewtwo adjusting to becoming a captured Pokemon, being a little too interested in his new trainer, etc. Kotone being conflicted/uncertain-but-curious herself; unwilling to tell anyone she can hear his "voice" in her head, reluctant to show him to Professor Elm and so on.

Should ideally end with dead of night dub-con in some cave or a Pokecenter