I think that Beemo is one of the best Adventure Time characters. He is cute, funny and he even has a backstory. Beemo was made in the MO factory, and his purpose was to be the first robot capable of having fun. Beemo has definately succeeded in his job!
I really hope that Beemo is included in a MAD sketch, even if he is just in a small sketch like a fake ad. As long as Beemo gets a speaking role in a MAD episode, I will be happy.