Honestly, all of these are quite bad.
Okay, all of these WGJ4K videos have one thing in common, they have Mickey, who is a total prick and mean to everyone. It also has no flow and with no transition periods at all.
Honestly, it's crude humor, with no class at all. I understand that Mickey is a complete asshole with no hint of compassion, and you're trying to get that message across, but honestly, it's just not funny. It's not funny at all. You can easily pull something funny with this character.
In this episode, apparently it's supposed to be Mario vs. Sonic. It wasn't Mario vs. Sonic, it was Mickey vs... Jeff? I don't remember his name. It's not really an imitation at all. It's just them two fighting in the character suits.
And in the description? It really didn't have any jokes or puns, maybe at the end, a little, but it didn't have anything at all. All this episode has is a one-sided fight that really wasn't entertaining at all.
Now, I hafta give credit to something. The animation, sound, and art. The animation is top notch, it flows so smoothly. Not only that, the sound and voices are all high quality which have no stuffy-ness at all. And I'm digging the art style. All the execution factors to boost the score by a lot.
But really the flow of the conflict matters more. Like I said, crude humor with no class. Try working on the flow of the conflicts, and transitioning through events sequences.