Mob Mese Monster Classic
TenPlus1

Adds classic Mese Monster.

Zombies4Test ( Reload )
PixelZone

Adding zombies, structures and weapons to your world..

Stalker
adikalon

Adds a scary and strong monster that lives in caves

Manny
ElCeejo

Adds Manny from that one Reddit post.

Mobs Ethereal Bosses
PixelZone

Adds Bosses in biomes from the "Ethereal NG" and "Mineclonia" mods

Forgotten Monsters (Reworked)
PixelZone

Add monsters and bosses to your world...

Slimes Redo
TenPlus1

Add green and lava slimes to your world.