what happens when you mix science and diapers? You get a diaper critter.
Poor poor joey had to learn that lesson the hard way after helping his girlfriend.
It was supposed to be a simple test of a telepod to see if it worked. Why a telepod you might be asking? Well Joey had the same question himself, why build a telepod when you have a portal gun. Apparently it was a contract job, some client wanted a set of teleporters to travel instantly between the two pods. Seems she didn't take Joey's diaper into account when running the experiment. After rematerializing at the other pod, Joey was suddenly all crinkly and poofy having merged with his diaper into a big diaper critter.
Oh well, it's a good thing his girlfriend is a super genius, she can have him back to normal eventually, but then again, why the rush? This is a rare opportunity to to do some tests on her new crinkly boyfriend. Not everyday you get to study a diaper critter, especially a fur turned diaper critter.
