I’m looking for something new to play with my 7yo son. Mario games are a great amount of fun, but I’m feeling pretty burnt out and am looking to expand things a little bit. We are looking for cooperative games like Pikmin 3, Cuphead, and Hyrule Warriors rather than competitive-only games like Super Smash Brothers and Mario Kart. We appreciate whatever help you all can offer, so thanks in advance!
I haven’t played any of the games you listed, but Pico Park and Unravel 2 are both puzzle-platformer co-op games that I’ve had a lot of fun with and would probably fit the bill for you and your son. Pico Park is simple in its mechanics and style, but offers lots of fun gimmicks. I played it with one other person but I can support up to 8, and I think playing with more would provide fun and unique challenges due to the way the puzzles are set up. Great to have as a party game in your catalog. Unravel 2 is two player only and has a beautiful, enchanting art style and small bits of story woven throughout. Good music, too. I think both are perfectly suitable in themes and difficulty for a young kid, though Unravel 2 has moments where is dark/spooky or used fire/flooding as a mechanic so be advised if your kid is sensitive to anything like that.