Suggested by Anonymous Captain America once became Captain Universe. In this form he has enough fire power to defeat most of Yami’s monsters without much effort. That still won’t be enough to beat all of Yami’s top tier monsters like Obelisk and the Dark Magician though. Together their abilities will be too much for him and Yami will also be supporting them from the sidelines with his spell and trap cards. Cap may be able to hold his own for a while, but he won’t be able to win. Yami Yugi wins.