The cartoon/anime I have watch had this very specific aesthetic similar to the "One More Time" video music by DaftPunk and the "40%, 40%, 20%" episode from Teen Titans Go!.
I remember very vaguely about it, but I remember that there was some sort of gigantic metal wall surrounding a city or maybe that wall was actually a very big starship, I can't recall exactly. I remember the path to this place was kind of a desert just like appears in that world from Teen Titans show. The characters (can't remember if they were heros or not) had their design similar to the Teen Titans design when they shift to that art style from that world.
Note: I'm talking about that kind of punk 80-90 animation style that features in that Teen Titans episode, not the actually regular everyday Teen Titans Go! episode design.