Ha ha ha, oh wow.
Well, you set off to piss off most people and to entertain the few, and you've definitely succeeded.
I must admit, I laughed a couple of times. Yoshi was the first time, and the sonic scene made me snicker as well.
Yoshi's part is totally incomprehensible, but I'm sure you meant for that. I think it would be better if it was slightly more articulate, and if one listened closely enough, you'd hear what he was saying. It would probably be something pretty gay. You could also add dialogue for the other characters' scenes, since it's mostly looping sound effects. The dialogue could be garbled static for all I care, I just think it would be funnier.
It's hard to grade this because it's not that well animated, there's no plot (among other things), but you since this was your goal (which you were able to reach in the end), it's a pretty mixed bag.
Overall, while this flash may not be exactly my cup of tea, it gave me faith that Newgrounds is still the place for obscene flash that most people would find terribly tasteless. Thank you.