Yoshi Is Fed Up.
I thought this was pretty decent. The animation while a little rough, was cute and a visible effort was put into the movements of the characters, a contrast to a lot of the stiff stuff I usually see.
My only gripe with this little parody is that I would like to see more, like Yoshi actually riding Mario and punching him in the neck to see how he likes that.
There's also more material to bring up. Like the fact that some times you have to dump Yoshi when jumping over a pit to reach a secret area that is out of your reach. Yoshi could that up.