Giant Elephant Beast Elebammoth (Episode 1) Born from a wooly mammoth fossil, it was sent to begin a new Ice Age and kill all of humanity in the process. Elebammoth begins freezing everything in his path with his liquid nitrogen gas. When he froze Yui, Kouhei battled the monster, losing to him, until the last Command Voicer flies into his hand as Kengo and Ran arrived. As Kabuto, Kouhei killed Elebammoth with the Cavalier Lancer attack.

Violent Dragon Beast Dinozaura (Episodes 3-4) Born from a Tyrannosaurus fossil, Dinozaura had 3 heads and 2 tails for hands. He was sent to destroy the power lines and sources in the city to affect Cosmo Academy's attempt to set up the Neo Beet Machines. Dinozaura was soon defeated by the B-Fighters. He returned with powerful bombs in his heads for a kamikaze attack to take out the Neo Beet Machines. When the B-Fighters learned this, after realizing Dinozaura was not attacking powerlines like before, they got him to follow them to the countryside to finally kill him after his heads detached from his exploding body.

Earth Dragon Beast Molardo (Episode 6) Born from a prehistoric mole fossil, he was weak at first until he ate a special fruit that empowered him. Molardo was killed when Tentou blasted his sunglasses off, leaving him blinded by sunlight and vulnerable for the deathblow.

Flame Ant Beast Baneria (Episode 8) Born from an ant fossil, she was sent to lay her eggs around Mount Fuji and as the eggs neared hatching, they began to rise in temperature, threatening to cause an eruption. However, Dezzle, intend on sabotaging his brother's plan, gave medicine to Baneria that would raise her body-temperature. However, the temperature in Baneria kept rising to the point of her becoming a living bomb. Kouhei managed to freeze Baneria to reduce her temperature so he could finish her off without any explosion.

Leaping Fist Beast Gangaroo (Episode 10) Born from a prehistoric kangaroo fossil.

Thorn Illusion Beast Cactusera (Episode 12) Born from half of a cactus fossil.

Bat Beast Zyren (Episode 14) Born from a prehistoric bat fossil.

Fang Tiger Beast Dygerfire (Episode 16) Born from a Smilodon fossil. Dygerfire looked like a combination of a mouse, with a second tiger's head on his forehead. Dygerfire could blast flamethrowers from his second/tiger head.

Destroyed Flower Beast Groba (Episode 18) Born from a fern fossil. Groba could sprinkle a destructive pollen from her head in battle.

Heat Fruit Beast Pineappler (Episode 19) Born from a pineapple fossil.

Heat Wind Beast Zarst (Episode 21) Born from a prehistoric vulture fossil. With the flaps of his wings, or a blast from his breath, Zarst could cause immense heatwaves.

Changing Color Beast Gameleorda (Episode 22) Born from a chameleon fossil.

Spirit Evil Beast Zalamander (Episode 24) Born from a salamander fossil.

Frightful Warrior Beast Driceraija (Episodes 26-27) A triceratops monster that was born from a part of Raija's body.

Dezzle's Monsters Dezzle's monsters are water-based creatures.

Trilo-Beast Trilobida (Episode 2) Born from a Trilobite fossil, he was sent to adbuct the girls at Kouhei's school and to absorb the lifeforce from people through his extending tentacles and use it to enlarge himself to giant size. Trilobida was almost invincible until the B-Fighters fired at his weak point, the small trilobyte on his forehead. Reduced to his normal size, he was killed by the B-Fighters.

Shell Turtle Beast Turtle-Geron (Episode 5) Born from an Archelon fossil, the powder scraped from his shell was sold as a calcium supplement called "Bone-Health", but began to harden people's skin into bone. B-Fighters attacked Turtlegeron, but his shell was too hard to be cracked. Though the only flaw was his belly, Turtlegeron covered it. However, it was Kabuto's determination that finally shattered the monster's shell.

Covering Star Beast Starfish-Najiru (Episode 7) Born from a starfish fossil, he could possess people & enhance their agreesive behavior. Targeting Kazyua Yano , the son of Kengo's late senei Ryuzaburo Yano, he used the man's hatred for Kengo to wreck havok across town. He uses smaller starfish parasites from his body to possesses people, turning them into violent slaves under his control. The B-Fighters were forced to retreat as a result. A plan was soon forumlated, while Kengo fights Kazuya, Kabuto & Tento handle the angry mob. The two fortunately learned that electricity was the starfish-parasites' weakness & used free the people with the Electric Shockwave just as Kengo managed to free Kazuya from Starfish-Najiru's control, forcing the monster out of him. Once gathered, the B-Fighters learned that Electric ShockWave was useless on Starfish-Najiru. But Kazuya's Triple Lightning Kick severely weakened Starfish-Najiru enabling Kuwaga to finish him off.

Greedy Fish Beast Coelaganza (Episode 11) Born from a coelacanth fossil.

Hell Sickle Beast Helltoad (Episode 13) Born from a toad fossil.

Changing Body Beast Anemolala (Episode 15) Born from a Sea Anemone fossil.

Sea Scorpion Beast Seascorpia (Episode 17) Born from a Sea Scorpion fossil. In battle, Seascorpia could detach/blast its' arms and its' connected head & stinger tail combo at opponents.

Water Dwelling Beast Kapparapa (Episode 20) A Kappa-themed monster.

Poison Fin Beast Okozezeze (Episode 23) Born from a scorpionfish fossil. Okozezeze could blast stinger darts from its' mouth in battle.

Other Monsters Some of these creatures were both Raija and Dezzle's monsters.

Tooth Clam Beast Ratclamra (Episode 9) A hybrid monster born from a rat fossil and a clam fossil, combining their strengths. But Ratclamra suffered a spilt-personality: a gentle creature & a sadistic monster. Despite reluctance to kill him, the B-Fighters had no choice.

Evil Snake Beast Snakyuza (Episode 25-26) A monster that resembles a gorgon from Greek Mythology.

Darkness Combined Beast Porcuray (Episode 37) A hybrid monster born from a porcupine fossil and a stingray fossil.

Darkness Combined Beast Meltzura (Episode 39) A fire-breathing monster that resembles a swordfish.

Darkness One-Horned Beast Misty Horn (Episode 43) A monster that resembled a unicorn.

Darkness Devil Beast Zadan (Episode 44)

Darkness Wave Motion Beast Dargriffon (Episode 47) A gryphon-themed monster.