If you’ve “beaten” Super Mario Odyssey — or at least seen the game’s credits roll — you might have noticed veteran kidnapping enthusiast Bowser had something to say about Mario’s outfit in the lead up to the final fight.
What you may have missed was the variety of costume comments Bowser has at his disposal. Thanks to a video roundup of Bowser reacting to all of Mario’s outfits — including the wedding dress he borrowed from Princess Peach — you can catch up quickly. (Actually, it takes a good 17 minutes to get through everything in YouTube user Zephiel810’s video, but there are a lot of repeated lines.)
The video is obviously spoiler-heavy, if you’re at all concerned about preserving surprises about Mario’s array of outfits. So don’t watch if you don’t want to know [redacted] Mario is part of Super Mario Odyssey’s wardrobe. The video is educational though, if only to confirm that, canonically, Bowser is afraid of clowns.