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>for years people say that villain teams are overly complicated and wish for something basic like Team Rocket to return
>in the drunken stupor of surprising competence of Gen 7, Team Skull is introduced and is immediately beloved
>now every villain team has to be "annoying nobodies", and every final villain must be a twist surprise
Alola always wins in the end.
The formula Pokemon did not learn from Team Rocket and Team Skull is that the best team must have a satisfying storyline, but it cannot be the main storyline. They must be important enough to do things, but not important enough to overwhelm the actual storyline.