When Lothor demonstrated his ability to make his monsters grow into giants, the Rangers unleashed the Ninja Zords, which could combine into the Storm Megazord and destroy monsters with its arsenal of Power Spheres. Lothor again raised the stakes by sending his new allies to battle the Wind Rangers - the Thunder Rangers Blake and Hunter, who had their own Thunder Zords. The Thunder Rangers were on a mission to destroy the Wind Rangers' Sensei, who they beleived to be responsible for their parent's death, but a visit from the afterlife from Blake and Hunter's parents showed them the truth - that it was Lothor who killed them. The Thunder Rangers saw the error of their ways and joined the Wind Rangers in the battle against Lothor, bringing the Thunder and Ninja Zords together to form the Thunderstorm Megazord.
When the Rangers lost their powers, Cam used the Scroll of Time to travel into the past and retrieve the Samurai Amulet, a family heirloom in the possession of his mother. Cam travelled back to present day and used the amulet to become the Green Samurai Ranger, armed with the Samurai Star. A lost scroll would later reveal to Cam the Lightning Riff Blaster, which could summon the Mighty Mammoth Zord.
Lothor attempted to open the Abyss of Evil and release its evil into the world. In a final battle, he stole all of the Rangers' powers, but was defeated by their ninja skills and thrown into abyss. The powerless Rangers resumed their normals lives, free from the menace of Lothor and his army.