This is a paid asset, but now you can download Micro Monster & Heroes Pack Low Poly Free.
Detail this asset from Unity Store: Original Link
Micro Monster & Heroes Pack Low Poly v2 (Latest version)
Low Poly Micro Monster Pack v1.1
“If possible, please buy the package to support the developer”
11 low poly hand painted micro monsters, all are rigged and fully animated.
Bat Vlad (608 Tris)
Demon Daryl (622 Tris)
Dragon Fino (400 Tris)
Ghost Hubert (552 Tris)
Mummy Taal (302 Tris)
Orc Gronk (396 Tris)
Skeleton Tom (284 Tris)
Squid Dave (420 Tris)
Troll Malak (666 Tris)
Werewolf Otis (362 Tris)
Zombie Brian (314 Tris)
2048 Textures (easy to downsize as required).