special items (key item trouble)

I am trying to make an event where you need these four key items in order to gain a character, and i give them a choice to say they have them, they don't have them, or they don't want to use them... well, when i say i have them and i don't, he joins regardless of the fact that you don't have the keys! what do i do?

Okay, You use a Conditional Branch

Fork Condition in 2k.

Have four, One for each item. Set them INSIDE each other.
Make sure they all have an "else" section, and make the Else be "nope, sorry, your missing something"

THen have in the four Conditional branches be getting the guy on your party.

Thank you!