Jamahl
The opposition of the Beetle Fighters were the evil army Jamahl, beings came from another dimension to invade the earth. The Jamahl's base of operation was a claw-like dreadnaught. The Jamar fighter planes existed from the center and the location of their new super-weapons.

Emperor Gaohm
The mysterious leader of the Jamahl, who first appeared as a tall figure with a white and purple robe and face that seemed to be full of fibrous. Gaohm possessed the power to teleport people and his warriors to the Gaohm Zonm another dimension to give them more power. Each Zone was a blank place with a few ornaments in the ceiling or walls that reflected the warrior there. Each zone would disappear once the monster was defeated. Gaohm was supposedly killed by the B-Fighters, only to reappear as Final Gaohm, a gigantic torso floating in space, with an exposed purple heart, only a right arm and wires running all through and over his body. However, both forms were decoys used by the real Gaohm, a small embryonic enity in a tank full of liquid. Gaohm revealed that he was born from a space warp and wandered through space until he gained enough energy to assemble the Jamahl for his life-long goal of capturing Saint Papilia so he could become immortal. To do so, he planned to use the Jamahl Hole to suck up the Earth's atmosphere and cease all life on the planet. In his mind, Saint Papilia would reveal itself to revive the Earth, only to be captured and be forced to give Gaohm the immortality. Gaohm was ultimately killed when his fortress crashed on Earth. Gaohm was later revived and absorbed by the sorceress Jagul in the series finale.

Jera
A female warrior who used a whip that she could charge with energy, as a weapon, in battle. Jera commanded the Mercenary Army. In battle, Jera discarded her robe to reveal a leotard-like, red and pink costume. She turned against Gaohm upon learning of Gigaro's death by Gaohm's doing, allying herself only with Shadow/Black Beet, who had also saved her from Schwartz's insane rage upon losing his body. After seeing Gaohm kill Hidra, Jera decided to rebel against her former leader. Upon seeing Gaohm in his true form, Jera was mortally wounded and cast back down to earth. After being found by the B-Fighters, her mask disappeared, revealing her to be a blonde, caucasian woman. Before dying, she revealed how the B-Fighters could infiltrate Gaohm's ship.

Schwartz
The leader of the Combat-mecha army, a mechanical body encasing a computer virus. After Gigaro died and Jera left the Jamahl, Schwartz fought the B-Fighters on is own. His body was destroyed in the process, though his head survived. However, the damage left Schwartz critically insane as he took control of various objects on Earth. Schwartz even tried to kill Jera, but she was saved by Black Beet.To finally get rid of him, his immortal head was blasted into outer space. It orbits the Earth for all eternity. He was last seen in Episode 48.

General Gigaro
A creature composed of various animal parts, Gigaro commanded the Synthoid-Beast Army. Gigaro was originally a skeletal creature on a desert planet in the Garo dimension, hunted for unknown reasons by humanoids. Exhausted and near death, Gaohm gave him a new powerful body and recruited him into the Jamahl. Gigaro used a white bonelike sword and his whale-flatop could open to reveal a gun. Gigaro imbued himself with life energy meant for the Jamahl to power-up into Final Gigaro, a red and white version of himself with more power. He was ultimately killed by his master Gaohm so that his life energy would accelerate the completion of the Jamahl Hole in Episode 47. Gigaro was originally supposed to be revived and absorbed by Jagul, but Mai and Kabuto's interference it didn't come to be and left Jagul with a weakpoint on her new body.

Sorceress Jagul
Appearances: Episodes 19-20 and 52-53
Jagui is a mysterious woman Gaohm commissioned to create an evil B-Fighter. Jagul sent a Kamikirimushi, a long-horned beetle to bite Takuya and take a blood sample from him. Created from what the beetle collected, Shadow came to be to become Black Beet. Jagui resurfaced long after Jahaml was destroyed and started kidnapping young women and resurrecting several defeated monsters to battle the heroes, including Gagamoth's first form and Iluba as well as Queen (Blue S.W.A.T.'s enemy), Billgoldy (Janperson's enemy), and assorted aliens that Blue S.W.A.T. had fought in their series. Jagul soon underwent a transformation into a composite-entity with eight arms and the faces of Gaohm's second form, Black Beet, and the various resurrected creatures (Bagma Virus, Death Mult, and some of the monsters fought by Blue SWAT) on her after reviving and absorbing them. She even betrayed and absorbed Queen and Billgoldy once they outlived their usefulness and their faces appeared on her. She trapped the B-Fighters, Janperson, Gun Gibson, and the Blue S.W.A.T. team in a pocket dimension, but Blue Beet managed to escape and hit Jagul's weakpoint (which Gigaro's face was supposed to go if he was revived and absorbed by Jagul) to release the others. She was soon mortally wounded by the ultimate attacks of Super Blue Beet, Hyper Shou, and Janperson's Flash Cannon which reverted her back to her previous form, and she was dragged into death by Billgoldy.

Jamar
Faceless soldiers that served and worshipped Gaohm. They flew fighter jets and were often given menial tasks. They speak like adult men. Gaohm has his own Elite Jamar, who are more powerful then the average versions. Elite Jamar can only be destroyed by decapitation. Elite Jamar can reassemble themselves as well as shoot beams from their eyes.

Jamahl Jet Fighters
Jet fighters piloted by the Jamars.