Kingdom Hearts How to get secret movie?

If this has been asked before I'm sorry, wasn't sure how to find it (I'm not used to searching... and didn't know what to search for)
But I'm nearing the completing of Kingdom Hearts (the first game) and wonder what I need to do before going up against Ansem in order to get the secret movie? Sure I have it on my computer but I want to see it in widescreen:p (I'm at the easiest mode, standard or whatever they called it)

 

The only thing i did, it was to finish the game for a second time. I don't know if you need to complete something, like the puppies list, i just finished it again and there it was. And i was lke what's this?!

 

To get the secret ending in Kingdom Hearts you need:

1.Find all dalmatians
2.Win the Hades Cup
3.Seal the keyhole to every world, including Hundred Acre Wood and Olympus Coliseum

Hope this helps.

 

Thanks a lot:) So I still need to win the Hades Cup, seal the keyholes in Olympus (unless I have... don't remember) Halloween Town and Hundred Acre Wood. I think I may have one or more missions left in that book...

 

I think to seal the keyhole in Olympus you need to use the yellow trinity to pust the stone. Good luck getting the secret ending.:D

 

Yeah... about that. HOW do I unluck the yellow trinity? It's not working for me:(

 

wait r u at the end of world defeating that ansem?
ok go to that stone in the coliseum and if you see trinity at the bottom of your command go press it and the rock will move ugh i dont remember i havent played the game in a long time well good luck on defeating the final bosses they're easy so don't worry well it depends on your lvl

 

You have to beat one of the cups to unlock Yellow Trinity. I'm pretty certain it's the Hercules Cup, but I'm not 100% sure. Sorry if I'm not much help.