Ultimate Muscle
is the pen name of the Japanese manga artists duo consisting of story writer Takashi Shimada and artist Yoshinori Nakai. They are best known for the popular manga "Kinnikuman", "Ultimate Muscle" (Kinnikuman Nisei), and "Tatakae!! Ramenman". Many English speaking fans abbreviate Yudetamago as "Yude" while discussing the different peculiarities of the duo.