Engines

The Go-ongers' mecha are the Engines, denizens of Machine World with some of them pursuing Gaiark, choosing the Go-ongers as their partners to fight Gaiark with them. While in the Human World, the Engines cannot exist in their full size and thus remove their Engine Souls to assume small forms called the Engine Casts which are kept in the Engine Attache until they are needed, resuming their true size on Earth for only 10 minutes, or suffer fatal rusting. But to fight, the Engines need the aid of humans to resume their true forms, their hearts allow the Engines to assume more powerful forms.

Among Engines are two races, the large Gian Race that can combine with other Engines and the rare Wing Race that are masters of aerial combat.