do i need to finish all gummi missions for S rank?

[Xehanort-X-blade]

ok i finished everything the journal and all gummi ships but i still didn't get the secret ending? do i need to win all S rank if it is than how it's so hard for me

 

[Noel]

What difficulty are you on? It's impossible in beginner mode. Standard is completing the journal and as well the gummi missions, and proud is when you complete the journal by its self. Finally in Critical, you have to obtain the proofs uve' existences. (Bronze, Silver, Gold)

Have you collected every treasure from each gummy mission? Also as well as the Ex-Missions?

 

[Xehanort-X-blade]

so i need to get all treasures and EX that's hard