How many boss fights can you SKIP in Super Mario Odyssey?

Kojoh

i looked into every boss fight and tried to figure out whether or not each one is required in Mario Odyssey. i hope you all enjoy :) Credits to people I used footage from: Gorganim -    / @gorganim   Tomshii -    / @tomshii   Tyron18 -    / @tyron18   BusterDoggy -    / @busterdoggy2   VideoGame Re