Drawings of Unofficial Crossovers - These Mix-Ups Fit, Don’t They?

The tag 夢の共演 (yume no kyouen, translated as “unofficial crossovers” on pixiv) is used for different characters appearing together in the same fanmade scene.

These scenes can be innocent, like Catbus (from My Neighbor Totoro) and a Molcar (from Pui Pui Molcar) comforting each other, or they can be more of a contrast, like Kobayashi (from Miss Kobayashi's Dragon Maid) and Makima (from Chainsaw Man).

Do you see any unofficial crossovers below that you think work really well?