Drew some concepts for a Splatoon, from the Octarian side.
[Possibly more concepts to come]
1) They’d have a make shift Inkopolis (Octopolis), Octarians are very resourceful so they’d have have tire seats in the diner area and speakers of all sizes welded to an old, repainted tower (resembling the tower from inkopolis plaza) and the countless adds (for clothes) will be shown on stacks of re purposed TV’s scattered around the area.
2-3) They’d have their own idols or idol to portray the upcoming battle stages, in this case Octo Mamma would be a pompous idol who flaunts her money and surrounds herself with her lacky’s and backing dancers.
4) By now the Ocatarians would have been able to maintain a male kid form (Octarian science or something)
5) With new shops there are new shop owners, the loudmouthed clam who stocks the freshest of shoes, the trendy mollusc for all your new shirt needs, the quiet (sea plant) for the perfect hat and the sea newt for a weapon to trounce all your competition.