Super Mario Rangers monsters season 1

The monsters of season one all serve Bowser and are summoned by Bowser's son Junior using his magic paintbrush.

Cyber Goom
The Cyber Goom was the first monster that the Mario Rangers fought and had a cyborg/chestnut theme. He wore silver armour, had a mechanical left arm, mechanical left eye, mechanical legs and wielded a laser rifle. He led a legion of Koopsters on his attack on Sommerset and the attack was successful until the new Mario Rangers arrived. After easily destroying his Koopsters they attacked him and he was destroyed when the Rangers used their Ultra-Cannon against him. However he was enlarged by Kammy and attacked the city again. However the Rangers called in their Zords, fought him for a while and then defeated him by creating the Megazord. He was later shown during the Halloween special, being assimilated by the Smithy Empire in Season Three and again during the Series Finale.

Wicked Wiggler
The Wicked Wiggler was at first a caterpillar themed monster and then a butterfly themed monster. It had a yellow segmented body with six red arms, a large nose and a flower in its head. It attacked the Mario Rangers briefly before running off and hiding. After this it became a chrysalis and mutated into a butterfly like creature. In this new form he was covered in a yellow fuzz, lost two of his arms and his nose (which was replaced by a proboscis), grew compound eyes, wings and antennae. After mutating he became much stronger and faster and whenever angry turned red and lost the flower on his head. However his rage turned out to be his downfall as the Rangers incited him into such a rage that he became angry enough to explode (which he mentions as being quite common among his species). Later appeared during the Series Finale.

Sonic Booom
The Sonic Booom was a ghost/sound themed monster. His head was spherical and had two stubby arms, fangs and blue eyes, while his body was mechanical and had two arms with foghorns attached to the shoulders, speakers seven speakers built into the chest and legs with clawed feet. He attempted to crash a rock concert, which the Rangers happened to be at by deafening everyone using sonic devices. The Rangers however quickly dispatched the Koopsters he had with him and destroyed his body. His head however attempted to escape by flying away but was destroyed by a blast from the Ultra-Cannon. Later appeared during the Halloween special and during the Series Finale.

Fishin' Cheep
The Fishin' Cheep was a fish themed monster who fought the Rangers atop a giant Mesa with a lake. He had red scales, wore a black vest, had fin like appendages and used a high tech fishing rod. He attempted to fight the Rangers by hiding in a lake and manipulating the water and trying to drown the Rangers. However before he could he was shot in the back with a harpoon by Captain Blooper. He and his wife later appear with Captain Blooper and the Sushi Knight trying to find an incredibly destructive Zord known as Unagi.

Captain Blooper
Captain Blooper was a squid/pirate themed monster. He had a squid like head which was surrounded by tentacles, has a golden hook for a right hand, a tentacle like left hand and a peg leg. He appeared in the same episode that the Fishin' Cheep appeared in, where he shot him in the back with a harpoon launcher. He then attempted to do the same to the Mario Rangers but was knocked off the Mesa they were on by the Ultra-Cannon shortly after he killed the Fishin' Cheep.