Louis Yodewara (also known as Yohdel) was first introduced in the Duel Masters Victory season of the Duel Masters anime. Yohdel and Bucchake are old friends. After Katta Kirifuda got transferred to their school and they found out that he is Shobu's younger brother they thought that he will become a great duelist as well, instead he just liked curry bread and despises his brother and the Duel Masters card game. Due to his friendly character they became friends and thought him how to duel. They also introduced him to their old friend Benchan who could help Katta build decks. (Source: Duel Masters Wiki)