Definitely the Voice Acting
This could've been good had you gotten decent voice work, or a better way of recording - I don't know.
I could barely hear what Link was saying. And Lucario talked tooooooo sssssllllllloooooowwwwwwww. Timing is everything in comedy.
I don't have a problem with the drawings at all, but a little more animation couldn't hurt.
I hope you fix it & resubmit.
Short But Excellent!
You can do better than this
First off, why is this called Lucario VS Toon Link if they don't even fight each other? The drawings themselves aren't very good at all. You could at least try to animate them moving there arms and body. The voice acting is horrible along with the lip syncing. Don't be afraid to ask someone on NG to do voice acting for you, i'm pretty sure someone will help you out. (if they have the time that is) As for the humor itself, it wasn't funny at all. Try to improve on that.
Try harder next time and work on the animation, lip syncing, voice acting and humor.
Look, I got bored.