This video shows all of the boss fights in the secret painting of Super Mario Odyssey. It’s similar to the story bosses except it’s harder difficulty.
Below are my playlists for Super Mario Odyssey.
Super Mario Odyssey 100% Walkthrough Playlist: www.youtube.com/playlist?list=PLle__6dXGka4I3zKCLGRZdU-2yMJuwPVI14