General Sweinhart (シュヴァィンハルト将軍 Shuvainhart Shōgun) is the main antagonist of Rocket Knight. He is in charge of the Devotindos Imperial Army and responsible for the truce between Devotindos Empire and Zephyrus.
Sweinhart is a veteran of the first war between the Devotindos Empire and the Zephyrus kingdom. After Devligus's demise, the Devotindos Empire was left without a heir, so Sweinhart assumed the throne, with the promise of restoring their Empire to it's former glory, since as a result of so many wars the Empire was left resourceless.
During the time when Sparkster was fighting the Gedol Empire, Sweinhart gathered a diplomatic caravan and approached the King of Zephyrus, proposing a truce. In exchange for Zephyrus's resources and sheltering the Empire would offer their technology and labor force. The King accepts the deal, and so the two countries become allies. When Sparkster returns, he attempts to convince the King to not trust the pigs, but the King keeps with his promise, as the mere presence of the pigs was keeping all other warring countries at bay. Distrustful, Sparkster decides to leave Zephyrus and retire from his job as a Rocket Knight.
Fifteen years later the Wolf Army stages an invasion on Zephyrus. Sparkster, who had been living as a farmer and formed a family, once again dons his Rocket Knight gear and travels to Zephyrus to defend them from the invasion, while Sweinhart leads the combined forces of the Big Army and the Zephyrians. Sparkster confronts Ulfgar the Merciless, the Wolf king, and defeates him in battle, but upon his surrendering Sweinhart turns on against them, revealing his plans to conquer Zephyrus using a gigantic robot he had been building this whole time. After destroying the Devotindos' secret factory where they had been building weapons, Sparkster returns to Zephyrus and confronts Sweinhart, defeating his giant robot and knocking the general to his apparent demise.
- Rocket Knight (2010)