In order to make the game more difficult for experienced players, tougher versions of Flemoidus Commonus appear on higher skill levels in place of the standard Flemoidus Commonus. As of release 5 the tougher commoni fire weak but fast moving flem projectiles at the player.
In order to make the game more difficult for experienced players, tougher versions of Flemoidus Bipedicus appear on higher skill levels in place of the standard Flemoidus Bipedicus. As of release 5 the medium level version of the bipedicus fires a weak but fast moving flem projectile at the player and the difficult level bipedicus fires a spread of three flem balls.
This Cycloptis variant appears physically identical to the standard Flemoidus Cycloptis, making use of the same sprites. Unlike the standard Cycloptis, this subspecies fires a dangerous spread of three slime balls towards its enemies.
Carried by a small helicopter unit strapped to its back, this flemoid launches itself with great velocity towards the player in order to slime him. So far, this flemoid has only appeared experimentally in The Ultimate Chex Quest, and is not yet part of any official release.
The Froggy Flem was a strange one, he loved water. So he spent much time by lakes and swamps, he soon learned the Flemoid code and joined the ranks. If you ever meet him watch out for his twin Flem Chainguns.
The "Flemoidus Roboticus", also known as the "RoboFlemoid", is big, tough, and mean. He just loves his new robotic upgrades, which the Flem Labs made him. He carrys 4 Flem Cannons that pack a punch! So be sure to either stay away, or be ready to strafe.
The "Flem Gas" is really a failed Flemoid test experiment. The Flemoids were trying to make a more powerful flying Flemoid like the Acrobatus (Flemoidus Gyro), and Cycloptis Tenacious. But eventhough he was a mistake, he is still a dangeorus Flemoid. While he does not have long rage weapons, he can speed up very quickly and slime you before you even see him.
The "Flemoidus Minecrawler" , "Flem Tank", or "Big Eddie" is no laughing matter. He is related to the "RoboFlemoid", but he has had much better robotic upgrades. For one thing, instead of 4 rockets he has a rapid firing Phasing Cannon. No one really knows how they got the cannon, but they did and he's got it. That's all you need to know about him... Well, except this. If you meet him better hope you have a big Zorcher.