1: Already Canon, No Further Comment

1: Already Canon, no further comment

2: Probably Canon, the entire species are effectively stated to have the motivation of a lazy teenager.

3: It was probably only semi-intentional, but see point 2.

Level 1: The setting of Splatoon is already post-apocalyptic, and Splatoon 3 just happens to take place in a part of the world where the consequences of that are more visible.

Level 2: The Inklings moved to the middle of a desert in order to inhabit a landscape that coordinates better with their post-apoc outfits, because they’re exactly the sort of fashion-obsessed weenies who’d think that makes sense.

Level 3: The Inklings deliberately caused a regional apocalypse so that their post-apoc fashion would be situationally appropriate.