I pretty much went through everything.

There's a Keypad in "Himawari's Asylum" in Room F201, does anyone know the code?

Also a question, since I have Tall Wendy as my assistant, a few questions:

How do I get small Wendy.

How do I get Luna as my Assistant back?

If anyone knows, let me know please.

It can be acquired after beating Rose in Rock,paper,scissors game. After that talk to her in the gallery to get the code.

To get small Wendy, complete Faith's quest. Then her vessel will be available for Wendy.

You can't get her back.