Bacchus and Hysteria had one son, Buldont, who gained a powerful adult form and assumed control of the empire in his father's stead, also marrying Princess Multiwa. Buldont and Multiwa were later destroyed by the but left behind a son.
Mondo and Machina had two sons, Sprocket and Gasket, with Gasket fleeing the empire after angering his father by marrying Princess Archerina, a daughter of Mondo's rival King Aradon. The two later took over the empire briefly from Louie Kaboom, but fled after the return of King Mondo, leaving their ultimate fate unknown.
Bacchus Wrath was permanently destroyed in battle against the Ohrangers, only reappearing to grant his remaining power to his son so Buldont could reclaim the empire.
Mondo was rebuilt several times after facing the Zeo Rangers in battle.
Had no rivalries with other evil Sentai factions.
Had a rivalry with the Evil Space Aliens, which started when they chased Rita and Lord Zedd away from their moon palace.
Baranoia disbanded after Buldont and Multiwa were destroyed by the Ohrangers.
The leaders of the Machine Empire were destroyed by Rita and Lord Zedd, who disguised a bomb as a peace offering.
They were later rebuilt and rejoined the United Alliance of Evil. They were neutralized when a major force of good wiped most of them out with his death.