(OLD) Top Ten Hardest Bosses in the Mario Series

''This is the outdated list of Top Ten Hardest Bosses in the Mario Series. The new one is here.''

This countdown has a transcript here.

Top Ten Hardest Bosses in the Mario Series is Animalguy001 (AKA Fawful's Minion)'s second video. It is a outdated list.

Poll
What is YOUR opinion on the Hardest Boss in the Mario Series? Giant Baby Bowser (Super Mario World 2: Yoshi's Island) Big Bowser (New Super Mario Bros. Wii) Crystal King (Paper Mario) Culex (Super Mario RPG) Dark Star Core/Dark Bowser (Mario & Luigi: Bowser's Inside Story) Tabuu [Intense] (Super Smash Bros. Brawl) The Master [Final Form] (Paper Mario) Ultimate Koopa (Super Mario 64) Bowser X (Mario & Luigi: Bowser's Inside Story) Cackletta's Soul (Mario & Luigi: Superstar Saga)