Near the end of Luigi's Mansion 3, when Peach is rescued from her painting before the final battle, one of her animations in the cutscene has her extend her neck to an irregular length.
At the end of the 1993 Super Mario Bros. movie, Daisy is wearing her own jumpsuit in the style of the ones worn by Mario and Luigi, but in that scene, she wears a jacket over it that covers most of it up, making it barely recognizable. This production photo provides an unobscured look at the design of the outfit.
In Super Mario World, if Mario uses the Cape to fly towards the keyhole in Donut Plains 1, lands on the upper platform and immediately inserts the key (as opposed to reaching it with Yoshi as intended, or landing on the lower platform), a graphical glitch will occur and the palettes of every object on the screen will be corrupted for the duration of the level exit animation.