In 2005, Duel Masters and Mega Man Battle Network (Rockman.EXE) had a cross promotion when their first movies were released in Japan: Rockman.EXE: Program of Light and Dark and Duel Masters: Curse of the Death Phoenix, with characters from each series having a brief appearance in the movies. At the time both series had a manga and anime being published by Shogakukan in CoroCoro Comic and TV Tokyo (same hour block). They also had toys produced by Takara Tomy.
Besides the movies, Eternal Phoenix and Dark Phoenix from Duel Masters are available in Mega Man Battle Network 5 as Giga Class Battle Chips, and a promotional card of Bass.EXE (Forte, Brave Fear Lord) was released for Duel Masters with two different artworks.
Later in 2016, a Duel Masters series containing several characters from different media was released. The series includes a Rockman.EXE & Katta card.