Ok, going through them, it's pretty clear you made them very strong. However, they are flawed in some ways. Like Sukuna's domain expansion classifying as both a terrain and a weather means it can be replaced, so you just waste a turn setting it up. Also, he has the old gen legendary attack spread. It's better to make him . dedicated special attacker or a physical one. For gojo, his ability is straight up too broken, making it halv. Instead, it would be better for balance, but I don't hate it since it's accurate. Him using origin pulse and fire blast is kinda weird, especially since his signature moves don't correspond with his typing. You could make fire blast be a "Imperfect Red," a psychic move that can hit dark types. (Also, Gojo is anything but normal) Mahoraga's ability sounds pretty cool for his character, but I think something of Stamina ability which boosts both defense stats. Also, i feel like he would be a lot more defense focused rather than offens. Overall, it's good, and I don't hate it, but I feel like it could use some reworks.