Yu-Gi-Oh! Go Rush!!

The story centers on Yuhi and Yuamu, two twins who spend their time searching for aliens using a mysterious device made by Yuhi. While their research never really leads to much, they eventually discover an actual spaceship, in which they meet Yudias, an alien traveler believed to have come from a distant region of space! The latter came to Earth to participate in the famous Rush Duels, in order to offer a new future to his comrades who had to leave their home planet due to war...