Amelia remained still and silent, watching the Mimikyu as it seemed to debate what to do. While it did so, Amelia went over what she knew about Mimikyu's, which was a fair amount. When the Pokemon turned hostile again, she didn't move and flinch. She could tell it was protecting it's friend but she had to wonder what else was going on. Given what she knew of Mimikyu's though, it was likely that it was scared of being alone. She knew Mimikyu had a hard time finding others to be with, due to their creepy nature. Hence why they dressed up like Pikachu. Given that, she figured she would see if that was the actual problem.
"Are you scared of being alone after Ratata is all better? Well, if Ratata leaves you, why not come with me? I love Ghost-Types like you. I'm sure we could be good friends. What about it? Does that sound good?" She said, her tone still calm despite the looming threat.