Depictions of characters being punched, kicked, scratched and attacked using supernatural abilities.
A dog is trying to attack Mario and Luigi, and they manage to stop him by trapping him in the shower
Mild slapstick. Characters get punched, slapped, tossed around and fall from heights (mostly for laughs.)
Fantasy animated action violence includes missiles being shot, fingers being crushed in a piano,and chases in which characters are in peril.
There's a scene where Luigi gets chased by DryBones (living turtle skeletons) and it can be very tense.
There's a fight between Mario and Donkey Kong. Both get punched, slapped, and Donkey Kong gets scratched by (Cat) Mario. All violence in this scene is supposed to be played for laughs. This is most likely the scene where the "mild violence" description in the MPAA rating comes from, as the majority of the "violence" in the movie happens in this scene.
Mild slapstick and fantasy/cartoon violence throughout. This movie is a bit more violent than the games, but not going over the top though.
Mario does a training obstacle course and fails miserably.
Bowser repeatedly threatens to "kill" various characters throughout the movie.
Bowser breathes fire on a Koopa Troopa, and all that is left is bones and eyes.
Bowser threatens to rip off Luigi's mustaches.
A medium sized dog chases Mario and Luigi in a fancy house bathroom.
Mario gets hit by many obstacles when he is training to be a bodyguard for the mushroom kingdom.