This is, unfortunately, the market. For many IPs, the only collectable that exists is the Funko Pop. So, it’s either one of those, or no memorabilia at all. (Personally, the latter is far preferable, but folks like their doodads.)
Mario & Rabbids Kingdom Battle was a rare gem from Ubi. Other than that, their best “recent” game is probably Rayman Legends, and that’s like a decade old now
You can 100% the first three Spyro games in about 9-12 hours each. The first one can be done without any backtracking, even, since you have the same move set throughout.
I believe modern games take 100% runs way too far. I enjoyed 100%-ing the 3D Mario games… and then I got to Odyssey, and it was such a ridiculous slog that I couldn’t get much further than the standard ending.