Power Rangers Sentinel Fighters

Backstory
Our Universe is actually one of the Three Levels of Existence, and planet Earth is the gateway to the next Level. The Armagnarok Empire is an ancient evil that inhabits Apocalypse Level, the level that symbolizes Evil, that aspires to rule over the Three Levels. The Armagnarok Empire has already taken over Sentinel Level, the Level where the creators and humanity's ancestors, known as Sentinels, reside and now have their sights set on conquering our Level, Tranquility Level. However, the lead Sentinel, Arcadion, chooses to help humanity as his final act of resistance before being captured: he sends the Sentinel Powers to Tranquility along with four resistance fighters before closing the Level Gateway.

The four Sentinels crash land on Earth just outside the town of Crystal Ridge where they are found by a young teenage boy who tries to help them. When Skitteracks break through the improperly sealed Level Gateway, the Sentinels and the boy use the Sentinel Powers to become Power Rangers and fight them off. Afterwards the boy agrees to help them prepare to fight the Armagnarok army, and the Sentinels agree to help him protect the Earth in exchange for finding the scattered Sentinel Powers.