But Donkey Kong is related to the Mario games, though. DO you know what Nintendo's first game ever was? That's right. Donkey Kong. Do you know who the main character was? BINGO! It was Mario.Then I have a reasonable question to that. Why is Donkey Kong included in most of those games? He in fact has his own series called Donkey Kong Country. That said Mario is not to Donkey Kong he is a totally different character. So I don't think you can say mario is to mario because it isn't. Other characters are included to mario games that aren't related to mario. It wouldn't hurt for nintendo to try things out and sometimes that is how great titles are made by trial. That is just my thought on the whole thing.