"So. . . I'm a Penguin now?"
Jimmy stated at his reflection, he had this white marks across his face and his nose was also black.
Guess he was a Penguin.
Guess he was moving by Martyn, which is a bad thing. . . But kind of a good cause;
For 1, the bad thing is Martyn was smart and quick and will relentlessly keep the toy joke alive meaning there's a high chance that one day he's gonna wake up to a new toy.
Number 2, He was a Penguin and unless he could find a Penguin mob. . . Uh. . . Well; Do some research on Penguins to understand how they live.

As for the good reason, he has heard from Scott that Martyn might need help controlling his powers which Jimmy agrees with and while Scott wants to help, he's been busy with Owen-or sorry, Sparrow who has fallen down a rabbit hole since he turned into a Copper Golem.

So; Guess it was up to Jimmy to keep an eye on Martyn, try and help him control his new fond ice powers.

Martyn was already stunned that Jimmy was now having to stay with him, but at least he had the sense to bow before him and his throne. . . And Martyn had to admit he was having trouble controlling himself.
"Least you admit it."
To that Martyn snapped his fingers, sparks of snowflakes appearing at the snap of his fingers.
"Watch it; I'll make a Penguin plush or action figure out of you."
Jimmy gulped, chuckling a little,"I-I know. . .", Martyn sighed, Jimmy rubbed the back of his neck,"So uh. . . Should I show you my abilities and what I can do?", Martyn shrugged, why not?
"Sure thing."