Complex sentence: Despite its power, however, the Dragonzord rarely defeats an opponent on its own and it is often used to simply rescue the Megazord when it is in danger or to form one of the other Zord combinations.
Split into simpler sentences: Despite its power, however, the Dragonzord rarely initiates combat or defeats an opponent on its own. Rather the Dragonzord enters the battle when the other Zords are in danger, whether to aid Megazord, or assist the individual Dinozords, and/or form one of the other Zord combinations.