Despite appearing as simply one of the many near-indistinguishable motion-controlled sports compilation games released in the wake of Wii Sports' popularity, Game Party Champions features an emotional and personal storyline about a child dealing with grief over their father's death, assisted by a character Spoiler:who is eventually revealed to be the father's ghost. Both writer Steve Bowler and voice actor Yuri Lowenthal were shocked by Warner Bros.' approval of the script. Bowler had intended for his daughter - who the protagonist, Riley, was named after - to play the game after he dies and learn life lessons from it.