Team Skull is your personal antagonist
They arent actually evil but they're a bunch of comedic thugs constantly trying to cause trouble over petty shit and impede your progress
They're legit the best enemy team Gamefreak has ever made because they're the most fitting. You're just a fucking 11 year old, you shouldn't be fighting the Mafia, ecoterrorists, PETA, and inter-dimentional invaders. This is also why the first half of SM/IUSUM is better than the second half. You're just having an island adventure with your friends