Langrisser: I Am Puer
A crossover with the Empire arc of Langrisser II for the Mega Drive. After failing at Stage 4, Bernhardt leads the remnants of the Rayguard Empire into the world of Langrisser III. There, they encounter Whitebeard's pirate crew from One Piece, Puer, a “good-for-nothing” who transmigrated from the modern world to another realm, and three mysterious young men from Darktide Harbor Village. Alongside the remnants of the Rayguard Empire, this motley band of characters sets out on a fantastical journey.
After the Emperor's Four Generals attack Mary Geoise, the Rayguard Empire becomes an affiliated nation of the World Government. The empire's Princess Nico Robin intimidates the helpless three Marine Admirals, Elwin becomes the World Government's Purple Dragon Marshal, and Tie Zhongtang, Yi Lian, Luo Han, Hou Longtao, the Demon King and the Hero, Death Pisaro, Gale's Bell, Chi Hanfeng, Chief Xiao, Red Wolf, and Lin Daiyu gradually make their appearances. The technology of the Red and Blue Moons and the horrors of the Warhammer world also begin to arrive, one after another.
In the dream battle, the emperor of the empire led the four army commanders and veterans through the different world of One Piece. With the help of three young people from the village, he began to try to complete the unfinished business.