User Summary Keroro RPG: The Knight, the Samurai, and the Legendary Pirate is a Japan-only RPG game based on the Sgt. Frog anime/manga franchise. The game shares many gameplay elements with the Tales series of games, and emphasizes the Linear Motion Battle System. Combat is real-time and places units on a single two dimensional line. The player controls a single character while enemies and allies are controlled by AI. Keroro RPG also includes a number of skit scenes to advance the plot.