In the Monstro thing u have to fight the cage parasite twice then you leave to Halloweentown, but what ever you probably have to finish what ever pooh bear pages u have or lock some key holes.
When my sister and I were playing this kind of happened to us, I can't remember but either we entered and left a bunch of worlds until we could go in to Montro or we did what I said above.
I hope this helps you. I went on the Internet and found the cheats for the whole game and then found tips on how to bet the secret bosses. please tell me if it helps or if you need tips and i will try to answer them.
This message has been edited. Last edited by: RebeccaV.,