Zuka is missing his right arm and part of his larger horn on the left side of his head is broken off. The reason behind this is not stated anywhere.
He is a former soldier of Blackrock during the war. Accordingly, he was a famous one and it can be stated that "everyone in Blackrock knew his name"[1]. He has since retired and runs Da Shop.
He's the adoptive father of Rocket and adopted him after he had blown his limbs up. He disapproves of Rocket having fun with pyrokinetics nor his participation in Phights according to Rocket's dialogue with other Phighters.
He has ties to Venomshank and has worked with the deities. Zuka has been stated to be favoured by some of the deities. Firebrand and Darkheart explicitly so. Darkheart would still be chummy with Zuka even if they don't work together anymore.[2]
Zuka was first revealed on 17 March 2022 where emotes featuring himself were added to the Boggio community discord server.
He was officially revealed at the end of the second playtest where he opened the cover of his booth in the credits.
B. Zuka is a pun name for the word 'bazooka'.
References
↑@soda-stuff on Tumblr, 3rd October 2023 ( Link | Image ) - "Has subspace ever heard of zuka when he was still popular back then?" "I wouldn't be surprised if everyone in Blackrock knew about Zuka"
↑@soda-stuff on Tumblr, 20th October 2023 ( Link | Image ) - "How do the deities feel about zuka?" "he’s actually quite favored by a few of them (firebrand and darkheart specifically)..."