As you know, the rooms of FM spawn a variety of monsters. If you are confused and are shitting bricks right now, heres a guide to help you!
NOOB MONSTER
Fm1-Green snails
Fm2-Bubblings aka Blue slimes
Fm3-Zombie Mushrooms
Fm4-Red Lizards
Fm5-Torties
Fm6-Red Drakes
MEDIUM MONSTERS
Fm7-Kru's
Fm8-Lycanthropes
Fm9-Dark Yeti and Pepe
Fm10-Bone Fish
Fm11-Cold Sharks
Fm12-Dark Wyverns
TOUGH MONSTERS
Fm13-Dark Cornians
Fm14-Jr. Newties
Fm15-GateKeeper
Fm16-Thanatos
Fm17-Nest Golems
BOSS/1337 MONSTERS
Fm18-Skelegons
Fm19-21-Pianus
PVP MAP
Fm22-Killing Map
Enjoy the guide and don't get confused. Gender confused that is...