[Apsm]

Ah so the hair was being replaced, just as I kinda expected. The object in his pocket is still a mystery. Now to point out some confusing passages...

The secret Panel Ferris had been replaced by a hatch, and the grimy emblem was now pristine and proudly displayed in the dead center of the metal door.

I think you mean 'the secret panel Ferris had found was replaced by a hatch.'

Larry replied, stretching his arms out to the side. He ignored the faint sensations that were sinking into his expansive muscles as he grasped the hatch's handle in both hands. Just as he was about to rip the hatch open, he was overcome by a sudden weakness, as if all the strength in his body was being sapped out by some unknown force. If he had been paying more attention to his body, he may have noticed that his rock hard abs and bowling-ball biceps were melting away into smooth flab. His legs and back lost almost all of their definition and his neck thinned dramatically. Within seconds the evidence of countless afternoons spent in the gym were wiped from his body and his mind. Wilson's eyes glazed over for a moment, which was just enough time to prevent him from seeing his friend suddenly swell up in his size before deflating. Larry lost new-found fat at a rate that would make dieticians foam at the mouth. His clothes, which had been struggling mere moments ago to contain his girth, shrunk down just as quickly to accommodate Larry's new build.

I wasn't sure if anything was happening to Wilson other than the fact his eyes had to glaze over to prevent him seeing the changes. And how was Larry(?) expanding BEFORE shrinking exactly? Did you mean his body was tense and then deflated?

Otherwise, keep up the good work. I am guessing this is another video game based tg, but I'd have no idea what game you'd be referencing (not being a gamer and all).