Garzo is the main villainous faction in Shinobi Legions.
- Shuriken-Ninja - Standard Ninja
- Rensha-Ninja - Command Ninja
- Kogatana-Ninja - Small Sword Ninja
- Bakudan-Ninja - Bomb-Throwing Ninja
- Bojutsu-Shi - Pole Fighter
- Oji-Musa No Nama-Kubi - Floating heads with fire abilities
- Kenshi - Swordsman
- Bujutsu-Ka - Won's subordinates.
- Nikolai - Former military soldier.
- Pucchimaru - Synthetic living creatures.
- Daija - Large poisonous snakes.
- Tariesu - Man with monsterous strength.
- Seiryu/Blue Dragon - Weaker version of Red Ragon.
- Oowashi - Large Eagles.
- Hannya - A giant oni mask remotely controlled by Ukyo.
- Sakyo - Ukyo's younger brother who leads the ninja army, and one the leaders.
- Ukyo - Kazuma's understudy with swift movements. Sakyo's older brother.
- Manu - Monster created in a bio-lab from the genes of numerous animals. Body is immune to shuriken attacks.
- Rushudo - One of the leaders of Garzo, who is the sole psychic. Uses an aura barrier to protect himself from physical attacks.
- Won - Another leader of Garzo, he's a master martial artist who comes from a fighting family, and uses Ki for his attacks.
- Red Dragon - A strong fighter of the Chinese martial arts, he uses a kusarigama & a fire breath.
- KM-99 - A robot armed with lasers & a hammer.
- Kazuma - Sho's older brother who leads Garzo. Has powerful Nindo abilities.