The beginning was too fast, Peach barely questioned Mario when they first met, she just immediately began training him for a quest, Luigi was caught at the start of the movie so he was barely able to do jack shit, Mario got the cat power-up when fighting Donkey Kong and started meowing and purring, Bowser was acting like a 4th grader who was jealous of someone taking his crush, the pickup line he used was cringe asf, Peach turned into Elsa, EVERYONE was sent back to Brooklyn, and like every Illumination movie, there had to be at least 8 pop-culture songs.
The only good things about it were Chris Pratt, Jack Black, and Seth Rogen doing the movie together.