During development, the Super Mario Bros. Wonder devs had an idea-sharing session and came up with over 2,000 concepts.
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Super Mario Bros. Wonder: Behind the Scenes with the Developers - Nintendo Supply
Ask the Developer Vol. 11, Super Mario Bros. Wonder – Chapter 1, News
Over 2,000 new ideas were in Super Mario Bros. Wonder development - Try Hard Guides
Super Mario Bros. Wonder Devs On Breaking The Rules Of Mario To Inspire New Ideas - GameSpot
Super Mario Bros. Wonder had no development deadline, staff came up with over 2,000 gameplay ideas
Super Mario Bros. Wonder Devs On Breaking The Rules Of Mario To Inspire New Ideas - GameSpot
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In Super Mario Bros. Wonder, New Power-Ups Really Pop - The New York Times
Super Mario Bros. Wonder Devs On Breaking The Rules Of Mario To Inspire New Ideas - GameSpot