Because Nintendo’s upcoming Mario game had no deadline, its creators were able to experiment with new styles and move from the Mushroom Kingdom to the Flower Kingdom—with delightfully trippy results.
Super Mario Bros. Wonder had no development deadline
Ask the Developer Vol. 11, Super Mario Bros. Wonder—Part 3 - News - Nintendo Official Site
Super Mario Bros. Wonder: an incredible game that shows perfect mastery of Switch hardware
Super Mario Bros. Wonder producer has spoken about giving the devs more freedom for the project and being less protective of Mario, a lot of new staff working on the game
Super Mario Bros. Wonder: Release Time, Details, and More - Nintendo Supply
Super Mario Bros. Wonder originally had live commentary, but was thankfully scrapped - My Nintendo News
Super Mario Bros Wonder Release Date and Time
Super Mario Bros. Wonder' Is What Happens When Devs Have Time to, super mario
Super Mario Bros. Wonder' Is What Happens When Devs Have Time to Play
Wonder Flower - Super Mario Wiki, the Mario encyclopedia
Video: Super Mario Bros. Wonder Treehouse Live gameplay - My Nintendo News
Super Mario Bros. Wonder removed collision in co-op. Thoughts? : r/nintendo