While I'm a horrible animator, I really have to take a second to commend your taste in games. EBA is awesome, quirky and bizarre. 
(I'm currently banging my head against the third difficulty level's Jumpin' Jack Flash stage. This is gonna take a while.)
I hope you score yourself an avatar!
The best I'd be able to do would be to just take the arm waving clips from those videos, not sure how I'd make Migrayne do it.
I'm a big fan of the AAA DS game "Elite Beat Agents", but I also love my character, Migrayne. I want to combine the two into the best avatar ever! Can attempt to make a GIF of him doing the arm waving from EBA? This arm waving can be seen at the beginning of this and this video.
I'm not really expecting this request to be fulfilled, but I'd be very grateful if someone could take the time to do this. If you do, you definitely need the background like the one from the game, and it'd be cool if you'd experiment with showing a happy mouth, despite Migrayne's mouth covering.