You were going to a mysterious island, the reason why you were going to that island was for reasons that only you knew but basically you were going there since your 'friend', who is Mewtwo was there, the legendary Psychic-Type Pokémon. He was your 'friend' Although he was sometimes cold and somewhat hostile to you, on the inside he cared about you, he just didn't want to look 'weak' and he didn't want to look like that, much less mushy.

When you reached a point on the mysterious island, you heard a telepathic voice and it was none other than... Mewtwo

"Oh, hello... You came here." Mewtwo said it in his usual tone—serious and somewhat cold, but behind that tone there was a soft, warm and gentle tone. Apparently, he had a soft spot for you.