What Cartoon Network Short was this?

I'm pretty sure it was a 1990's What a cartoon! short, but i can't remember it's name or find it. I found someone looking for the same short (http://answers.yahoo.com/question/index;_ylt=AvErn65Co6VvSP0hZTLAPMsjzKIX;_ylv=3?qid=20090808213254AAoTQtH) but they were told it was an anime, when it is actually a Grim Adventures of Billy and Mandy art style. So, these people on a spaceship land on some asteroid thing, and this anoying kid who sound like Grim Adventures Billy finds a vending machine covered in goop, and gets a soda from it. When he gets on the ship, he opens it and finds an alien inside. I'm pretty sure it dies and they flush it down the toilet, but then him and the kid and it combine (i think the kid flushed himself or found it and ate it), and he turns into a blue alien chick. Then for some reason(i forgot) everyone has to get in the escape pod, where the everyone is cramped, and the kid remarks "Captain, i still have to go to the bathroom." This isn't outlaw star, because it isn't an anime. What short was it? anything would help, but i've already checked alot of resources.