I don't have anything planned with anyone yet, but I have some ideas I've been batting around that could be used for threading purposes!

• Even though MTT's one of the escapees, he has a talent for shapeshifting and vocal mimicry as a Puca. (Though the best way to tell it's him is that he can't remember how many fingers humans are supposed to have...) With some help, perhaps another Mirrorbound can subdue one of the Rathmores and he can steal their image and their keys to unlock some cells, temporarily undetected. Get as many people as possible out of their cells and onto the floor.


• A lot of characters seem inclined toward being strong, and Mettaton's a perfect candidate for this. Since he's made of metal, there's little to worry about if your character has to be rough with his shackles. I'd love to thread out having a character help free him of the chains binding his legs.
  
  Speaking of limbs, if it ever comes up that Mettaton is apprehended/bound by the arms... Well, he'll recommend tearing them off for him in a heartbeat, if you're down for that. Who needs arms with legs like these? It'll hurt now that he's become more cyborg bunny, less android, but, details. Just... hold onto them, ok? He wants them back when this is all over.


• He is Fast, since he's a Puca. He'll need help keeping the path to the exit clear, and it's more than likely that he'll get caught along the way. Having help getting free of these situations will be helpful.


• As with other escapees, Mettaton will gladly relay dramatic messages to your character's loved ones. By dramatic, I mean it might turn into a love confession on the way out of his mouth. You want that, I'm sure. He'll really stoke those fires of love to get some action! Otherwise, his focus upon escape is to be as loud about their location of capture as quickly as possible, which is helped by being a speedy Puca.