Monsters

Day

 * Slimes (Green, Blue, Purple)
 * Pinky
 * Harpy
 * Bunny
 * Goldfish
 * Goblin Scout

Night

 * Zombie
 * Demon Eye
 * Harpy
 * Dr. Bones (rare)
 * Groom (rare)
 * Goldfish
 * Bunny
 * Corrupt Goldfish (Blood Moon)
 * Corrupt Bunny (Blood Moon)

Desert

 * Vulture
 * Antlion

Ocean

 * Shark
 * Jellyfish (Pink)
 * Crabs

Dirt Layer

 * Slime (Blue, Red, Yellow, Purple)
 * Pinky (uncommon)
 * Giant Worm
 * Piranha
 * Goldfish (Uncommon)

Stone Layer

 * Slime (Black, Mother, Baby)
 * Giant Worm
 * Skeleton
 * Tim (rare)
 * Undead Miner
 * Cave Bat
 * Piranha
 * Goldfish (Uncommon)

Corruption Monsters

 * Devourer
 * Eater of Souls
 * Little Eater
 * Big Eater
 * Corrupt Goldfish

Meteor Monsters

 * Meteor Head

Dungeon Monsters

 * Dungeon Guardian
 * Short Bones
 * Angry Bones
 * Big Boned
 * Cursed Skull
 * Dark Caster
 * Dungeon Slime

Immortals

 * Blazing Wheel
 * Spike Ball

Underground Jungle Monsters

 * Hornet
 * Man Eater
 * Piranha
 * Snatcher

Surface Jungle Monsters

 * Snatcher
 * Jungle Bat
 * Slime (Green, Jungle)
 * Piranha

Underworld Monsters

 * Bone Serpent
 * Fire Imp
 * Demon
 * Hellbat
 * Lava Slime
 * Voodoo Demon

Goblin Army Spawns

 * Goblin Warriors
 * Goblin Sorcerers
 * Goblin Thieves
 * Goblin Peons

Special

 * Servant of Cthulhu
 * Eye of Cthulhu
 * Dungeon Guardian
 * Skeletron
 * King Slime
 * Eater of Worlds