Mike decides that he might as well try to become Joe, since it would be more difficult to pull off once Joe got back to school. He'd have other opportunities to switch with Rich or someone else, but once Joe moved in that window would be closed.
Mike quickly starts rummaging through his dresser, searching for Joe's old shirt, and soon finds it amongst his recently unpacked clothes.
"Well, here goes nothing", Mike says as he reaches for the Medallion. Without a second's hesitation, he grabs the Medallion off his bed and feels a shock as it touches his hand.
Immediately, Mike felt his body start to change