CR 0–4 monstrosity creatures from Monster Labs. These public stat blocks fit that band of the table; remix the CR or abilities if your party is ahead of the curve.
Furrocaster
CR 4 · Monstrosity
Raging Werewolf
CR 4 · Monstrosity
Gorillafly
CR 4 · Monstrosity
SOAD
CR 4 · Monstrosity
CrocoMonkey
CR 4 · Monstrosity
Gorippo
CR 4 · Monstrosity
Blue Fang
CR 4 · Monstrosity
Nude Monster
CR 4 · Monstrosity
Darkclaw Burrower
CR 4 · Monstrosity
Ugly Fat Monster
CR 4 · Monstrosity
ha-Akavish
CR 4 · Monstrosity
Phallic Mauler
CR 4 · Monstrosity
Mystical Shadow Serpent
CR 4 · Monstrosity
Deep Terror
CR 4 · Monstrosity
Theater Mimic
CR 4 · Monstrosity
Darkwing Scorpion
CR 4 · Monstrosity
Stinktail the Wereskunk
CR 4 · Monstrosity
Vultocrocler
CR 4 · Monstrosity
Gatorocto
CR 4 · Monstrosity
Crow Mauler
CR 4 · Monstrosity
Polycephalous Triton
CR 4 · Monstrosity
Chainsaw Masturbator
CR 4 · Monstrosity