This character doesn't have any unlockable outfit.
Rat is a limited character from . He can be unlocked for 60.
Rat is a man from Asia. He wears a white Chinese rat mask which has gold eyebrows, a nose, a gold ear, a piercing that has a red fringe attached to it. The mouse mask also has some black whiskers with some red markings on the mask as well. He has a red and gold kung-fu robe with loose red pants, black shoes, white bandages on his legs and he carries a gold staff with him. He also has a white rat tail and black hair that is in a braid.
He has the same cost as Ox in (who also needs 60 to be unlocked).
He is the seventh character that has a mask that covers the entirety of their face, second being Izzy (Laki outfit only), third being Marco (Mask outfit only), fourth being Jaro (Joker outfit only), fifth being Mei (Islander outfit only), sixth being Ox, and eighth being Pride Frank.