Mario series is a series of highly popular and acclaimed video games by Nintendo, featuring Nintendo's mascot Mario and, in many games, his brother Luigi and his best friend Yoshi. Hacked Mario games usually feature simple plots; the most common theme is that of Bowser, the primary antagonist, kidnapping Princess Peach, whom Mario saves. Despite the plots usually being very simple, the Mario role-playing games tend to have deeper plots, often involving enemies other than Bowser (many of which involve Bowser actually teaming up with Mario), with aspirations for world domination. Mario has been featured in 200 games, and the series has sold over 200 million copies total, making it the best-selling video game series of all time.