A champion is a player who is the final CPU faced in a sport, whos skill beats the rest.
List of Champions and their played sports
Sakura - Baseball (WS)
Matt - Boxing (WS) and Swordplay (WSR)
Elisa - Tennis (WS)
Sarah - Tennis (WS)
Lucía - Table Tennis (WSR)
Tommy - Basketball (WSR)
Alice - Tennis (WSC)
Barbara - Tennis (WSC)