Complex sentence: Its four members--parallel versions of Bushroot, Quackerjack, Megavolt, and the Liquidator--were retrained by Darkwing Duck into "Darkwing's Ducks".
Split into simpler sentences: Its four members consist of parallel versions of Bushroot, Quackerjack, Megavolt, and the Liquidator. They were retrained by Darkwing Duck into "Darkwing's Ducks".