Shipwreckt bosses: different versions for diferent shipwreckt addon modes (Ex tropical experiance)
tiger shark:
can swim, but needs be be wet or shell dry up
sealnado:
flies and deals damage (1/4th of the items damage in hand) in a radious. tools only loose durrability when used to mine or chop something.
quacken:
idk

hamlet bosses: required a mod that adds hamlet stuff (tropical experiance for example)
batskalisk:
can dig to get a speedboost on most turfs.
queen wormant:
like wurt but for wormants instead of merms.
large iron hulk:
can shoot lasers and teleport at the cost of 20 hunger and salnity. can be upgraded like wx.
anceint herrald:
is a ghost, duh

ones i forgot about:
shadow pieces:
have their abilities like in their fight, relitively weak when all three are alive but are upgrades when one die. you can swap which one you are.
klaus: starts with a fire and ice staff, when you use a fire or a ice staff they lose no durrability. heat acts like deerclops.

It says than non original ROG bosses will NOT be addded

:(

@1920Robodoodley110 Read the title of this discussion carefully. You'll probably figure out what this discussion is for. Just trying to help.

Ancient Fuel Weaver, The Dark, (Formerly) Manipulative Demon (AFW for short): Is considered a monster by Pigmen, Merms, and Bunnymen. Has night vision. Nightmare creatures are completely passive to players, as long as this character is nearby. Can see and attack and/or recruit Nightmare Creatures spawned by any source, self, another player, or otherwise. Recruiting Nightmare Creatures makes them friendly to all players, meaning they will only attack non-player hostile or neutral entities, except their fellow Nightmare Creatures and passive entities (Unless an AFW player attacks a passive entity or unrecruited Nightmare Creature (or, in PvP, another player,) in which case they will attack the entity targeted by their respective AFW.) Can regain Hunger, Sanity, and health by eating any "Evil" materials, such as Nightmare Fuel. Sanity drain only occurs on the Surface during Daytime, unless AFW is wearing a hat that provides shade, such as the Straw Hat, or is sleeping at a Siesta Lean-To.

AFW also provides a Sanity Gain/Drain Prevention effect to themselves and those around them, meaning players near them neither gain nor lose Sanity passively, and can only alter their Sanity by eating/drinking, clothes/armor, and headwear.

@GlitchSans240
oh yeah, forgot i titled it that. anyways here the other 2. along with moon champ
Krab king: can swim. special backpack that holds gems (or pearls pearl). putting gems in there gives you power. however the wetness temperature affect is reversed (less wetness = more heat). also no chest equips.
Gaurdian: rams things (behaves like moose woodie, but with more damage), no darkness sanity loss. has base insulation due to Hairs, move slightly slower.
Moon champ.: gains power based on moon phase. on gibbous or full moons, you summon gestalts on attack, move 1.2x faster, and won't loose sanity during the nights. on crescent and new moons however, you lose 5 sanity per minute (-10 during night/dusk), move 0.9x slower, and do only 0.8x damage. additionally you have no penalty when reviving and get a 1.1x attack buff for 2 days. when in caves (unless in lunar grotto) you lose 2.5 extra sanity per minute, and when in the lunar grotto you can only get the positive moon cycle affects. however in the ruins during the nightmare cycle you get the negative affects (cancels the -2.5 sanity drain)

Eye Of Terror Eh? Cthulhu