https://www.gamespot.com/articles/check-out-marios-8-strangest-moments-ever/1100-6454177/

In just over a week, Mario will embark on one of his biggest--and weirdest--adventures to date, Super Mario Odyssey for Nintendo Switch. As usual, his longtime nemesis Bowser has captured Princess Peach, and to rescue her, Mario will have to explore a number of sandbox-style Kingdoms like in Super Mario 64 and Super Mario Sunshine.

Things are a little different this time, however. Not only does Odyssey take Mario to some bizarre new worlds such as New Donk City--a metropolitan area inhabited by realistically proportioned people--he'll be joined by a ghost-like being called Cappy, which inhabits Mario's cap and in turn grants him the ability to possess other characters and objects.