This list aims to help all Dark Souls enthusiasts out there see all the bosses in order, as well as their weaknesses, type of bosses, and tutorials on how to kill them. You can clone this list and use it for your completionist pleasures as you defeat each of the bosses.
In order to use this list as a checklist, use the menu below this description (on desktop) or the top right corner (on mobile) to switch views. You can also view this list as a kanban board, grid, and slides.
Dark Souls II Wiki
GamesRadar
FightinCowboy