Tập 1: Kid Muscle đến để giải cứu Trái Đất khỏi Adversarius sau nhiều năm hòa bình

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Years have passed since King Muscle and the Muscle League Champions vanquished the evil dMp wrestlers. Lacking strength to stand up for itself, the Earth must turn to the Kinniku family. All hope for salvation is in Kid Muscle. Kid Muscle reaches the Earth and makes a less-than-welcome acquaintance: Adversarius, who has come to extinguish him before he can follow in his father's footsteps. (Source: Wikipedia)