(Okay, Suppercut's taking Phoenix. Initiating exposition dump!)
Maya looked at Phoenix. "Just to remind you, this is about a bunch of incidents that happened, with Mewtwo in the middle of each one. He caused damage in Stone Town, the first time when Team Rocket invaded to capture him, and the second time against Carr. In Fuschia, he caused a huge explosion, which leveled a city block. In Vermillion, he took part in a battle which also leveled another city block, a battle that was started by another Pokemon disguised as him. A sinkhole in Fuschia is also blamed on him, and there are accusations of large-scale mind control."
She glanced at her notes. "Basically, Team Rocket claims that Mewtwo's current trainer can't handle his power, so they're working to get him back. We need to prove to the court that Team Rocket has history of abuse and won't take proper care of him, and aside from these current accusations, Mewtwo was well taken care of for years without any problem."