Just because it's late and I'm feeling silly, I'll drop you a hint. Think of it as me being Reinhart and the person offscreen as Annerose. Let's see who gets THAT reference... ;p
M3G4133T = Megaleet
Ed-chan no Ribbon is a pun on the anime series Hime-chan no Ribbon. In the third panel, Ed is chanting words from Hime-chan's disguise magic spell, while the show's opening theme song plays down in the corner.
変身 = henshin = transformation
o/~ is a loose ascii text representation of an eighth note.
The shouts of "Noooooooooo!" in the fourth panel are reminiscent of Pedro from Excel Saga.