Hello Kitty: Happy Party Pals Codes -

Throw party at any location:
Enter MYCHOICE as a password.

Start with Flute:
Enter UYSHOICE as a password.

Start with Necklace:
Enter UYSHOKE as a password.

Start with Race Flag:
Enter UYCHOICE as a password.

Party anywhere with red fish starting in inventory:
Enter URSHRKCE as a password.