Kingdom Hearts Help in KH

Since there's no KH help forum, I guess I'll put this here.

I'm replaying the first KH, and I want to go back to Monstro's world to get some newly unlocked trinities, but whenever I go back to the world, it says he's gone. How to I get back to Monstro?

Also, how do you see how many treasure chests you've left in a certain world? I do recall being able to do that, I just can't remember how.

And what are the requirements to getting the secret ending?

 

Monstro just appears randomly.

As for the secret ending, if i remember correctly you have to:
Clear the Hades Cup
Find all 99 Dalmatians
Seal all keyholes (including 100-Acre Wood).

I can't remember if you can see what treasure's in each world.

 

You can only see certain trinity marks in each world, not the treasure chests. I don't think KH1 even has a treasure chest list. O.O

 

To see the secret movie you must either:
-Win the Hades cup
-Find all 99 dalmations
-Seal all the keyholes to all the worlds encluding 100 acre wood

OR

Finish the game in expert mode.

As for the trinity marks in monstro:
Location Item/event
mouth munny, 2 potions, cottage
Throat munny, mythril shard
Chamber 5 munny cottage

Mouth- on top of geppetto's ship mythril shard

Chamber 6 Thundagra-G

Hope this helps. If you need any help finding all the dalmations(anyone) PM me. I know where they all are.

 

i think its chamber 4