Genki is the master at the game Monster rancher.. he enters a contest and wins a full version of the game before it's released! When he gets home he puts it in his playstation, turns it on and begins to read.. then it sucks him into the game and thats where he meets Holly and Suezo. Holly is just a normal girl and Suezo is a giant eye.. anyway they escape from whatever was after them at the time( dinosaur monsters of sorts? ) and Genki shows them his game.. its a mystery disk! Mystery disks hold monsters in them, they can be released at shrines basically.. anyway he goes to a shrine.. thinks about what kind of monster he wants.. and on like the second try one pops out. Its name is Mocchi! It's a pink looking penguin thing with a green back. Anyway the story progresses.. it turns out the evil guy turning all the good monsters into bad monsters is called Moo! They must defeat Moo to stop 'baddies' from ruling over the world. Supposivly only the Phoenix monster can stop him? Dunno though, I was kinda bummed when they didn't finish the series..