Ty immediately wished for Rex to become 6'0" and lose about 240 pounds of muscle, making him weigh around 230 pounds. He also wished the size Rex lost was put in the form of a small pill for later usage. The magic quickly went to work, causing Rex to feel nauseous as his body began contracting.
"That coffee's really fucking me up." Rex said, clutching his stomach before falling flat on the bed.
Rex felt what was happening, watching as his body shrunk in size. Sweat poured out of every pore, his skin flushing red. Within seconds his clothes were soaked. Rex saw what was happening, but couldn't believe it, nor could he take it. He began moaning in pain, clutching to his shrinking mass as if he were trying to hold on to his skin. Ty, much like Rex, was awfully frightened. Ty figured it was because he wished for it to happen immediately, meaning Rex's body wasn't prepped for the change like Ty's previous targets. Or maybe it was because his size was being put into another form.
After a minute or so, Rex stopped moaning, and was now left a sweaty, panting mess. His clothes looked like blankets that were sightly too small. Rex wasn't tiny or anything, he was now more of a manageable size... Though he still resembled an amazing bodybuilder.
"Ty... What happened?" Rex asked between breaths.
"I made you smaller so you wouldn't be so unhappy. You can now buy clothes that fit, play sports, and get whoever you want. You're still pretty buff though!" Ty replied with a weak smile.
Rex's eyes widened when Ty explained. He knew what happened, but it just hit him that he was now "normal" or something close to it. He hopped up from his bed, finding great satisfaction in his new, lighter, more manageable body. Once on his feet, his drenched pants and boxers slid off his smaller frame, while he ripped the shirt off himself. Then he went in front of his mirror to get a good gander of his new body. He appeared the same, just on a smaller scale. Nevertheless, he was overjoyed. He was happily rubbing and groping his new muscles - which could now actually be squeezed as apposed to his previous mountain-sized muscles.
"This is fucking amazing!" Rex exclaimed, "Wait, this is fucking UNREAL! Ty how'd you-"
"Magic, duh." Ty rolled his eyes, wishing for Rex's previous set of clothes to be clean and shrunk to fit his new size. Then he wished that they were on Rex.
Rex was about to laugh when he noticed he was now fully clothed. "Okay, I guess I have no choice but to believe you now."
"Well, I hope you would after all that. Oh, and by the way, that small box on the table contains a pill. It's all the size you lost, you can take it or ask me to grow you back... Or you can give it to someone for fun. Oh and, are you happy with the big change? I could always tweak it for you." Ty offered while taking a gander at his work.
"Well..." Rex trailed off as he turned around to look at himself in the mirror. He figured Ty could change anything. He was contemplating if he should ask for something crazy for fun, keep it semi-normal, or just keep things the way they are.