"That's stupid." Shizuo did want to return to his own world, though. Unova was a nice break from the ultra-busy city life he was used to, but he didn't want to stay here forever. He might not like the city but even someone like him had attachments. If he began battling, though, he would feel like he was going against his anti-violence views.
Shizuo you could try using the Xtransceiver dude
"Just one of the ways?"