The list currently contains 180+ bosses and minibosses, arranged in a logical order from easiest to hardest. You can also move them using Alt + mouse wheel scroll.

Currently supported bosses include:

• AdventureZ
• Aether: Lost Content Addon
• Alex's Mobs
• Alex's Caves
• Ancient Elements
• Aquamirae
• Armageddon
• Ars Nouveau
• Arthropocolypse
• Beneath the Wetlands
• Blue Skies
• Born in Chaos
• Bosses of Mass Destruction
• Bosses'Rise
• Call From The Depth
• Call of Yucutan
• Companions!
• Confluence: Otherworld
• Cracker's Wither Storm Mod
• Cult of Azazel
• Dark Doppelganger: Iron's Spells and Spellbooks Addon
• Deep Aether
• Deeper and Darker
• Dungeon Now Loading 2%
• Dungeons And Combat
• EEEAB's Mobs
• Ender Trigon
• Epic Fight - The Wraithon
• Eternal Starlight
• Friends&Foes
• Frostiful
• Galosphere
• Goety - The Dark Arts
• H's Bosses
• Illage and Spillage
• Illager Invasion
• Iron's Spells 'n Spellbooks
• Knight Quest
• Legendary Monsters
• L_Ender's Cataclysm
• Marium's Soulslike Weaponry
• Mine Cells
• Mofu's Broken Constellation
• Monster Expansion
• Mowzie's Mobs
• Mutant Monsters
• Mutant More
• Myths & Legends
• Qilpoth Awakening
• Rediscovered
• Remnant Bosses
• Sleepy Hollows
• Terramity
• The Aether
• The Conjurer
• The Graveyard
• The Twilight Forest
• T.O Magic 'n Extras - Iron's Spells Addon
• Unusual End
• Wither: Reincarnated
• Yori3o's Trash 'n Brainrot

and the vanilla ones.

The mod has an editor menu where you can add or edit a boss. Additionally, by holding Alt and scrolling the mouse wheel, you can change the boss's position in the checklist.

You can create an addon using the files from config/boss_checklist/override/; details are on the wiki.

You can also send these files to me (on GitHub or elsewhere), and I can add them to the mod.

• Client: progression mode, ignoring defeats without your participation, search bar, progress bar, statistics tab, health and armor display, animations, and the buttons (pause menu, inventory, editor) with their offsets. Most of these are available in the in-game settings; a few are file-only and meant for modpack makers.
• Server: statistics, saving the boss killer's name, and multithreading.

Then again, the bosses themselves can also be edited.