Here is an overview of the update, via Nintendo:
In “World Maker” mode, multiple courses created by a user can be tied together on a path from the starting point on a world map to the end castle. The look of the world map can also be customized. Up to eight worlds containing a total of up to 40 courses can be combined, creating a mini Super Mario game that can be shared with others.
In addition to “World Maker,” guess who else is making an appearance in Super Mario Maker 2? The Koopalings! All seven of these troublemakers, each with his or her own movement pattern, can be added to user-created courses. Other enemies added to the game include the key-chasing Phanto and the wind-up Mechakoopas.
Additional power-ups and course parts are also coming to Super Mario Maker 2 as part of the free update. This includes the Super Mario Bros. 2 Mushroom, which transforms Mario and friends into their look from the Super Mario Bros. 2 game and allows them to pick up and throw items and enemies – just like in that classic game! With the Frog Suit from the Super Mario Bros. 3 game, Mario can swim through water with ease, and even run across its surface! Other power-ups added to the game are the Power Balloon first introduced in the Super Mario World game, the Super Acorn from the New Super Mario Bros. U game and the Boomerang Flower from Super Mario 3D World. There are also five variations for wearables like the Cannon Box and Propeller Box from the Super Mario 3D World game.
Super Mario Maker 2 is available now for Switch.
Watch a trailer for the update below. View a set of screenshots at the gallery.