Hi Jacqueline!
Thank you for bringing your question to
planDisney! I am sorry to hear that your group is unable to attend
Mickey's Not-so-Scary Halloween Party with you.
Unfortunately, special ticket events, such as Mickey's Not-so-Scary Halloween Party are non-refundable and non-transferable. As such, you will be unable to change the ticket to a general park admission ticket.
However, did you know that you can enter
Disney's Magic Kingdom as early as 4 pm with a Mickey's Not-so-Scary Halloween Party ticket? You can meet up with your friends at 4 pm and enjoy a few hours in the park together before the party begins. The park closes at 6 pm and the party officially begins at 7 pm.
I definitely encourage you to go to the party, even if you go alone. I've gone to Walt Disney World alone before, and I have to say, it's actually a lot of fun! You can ride all of the attractions that you want, enjoy watching the Boo-to-You Parade (and you may be able to score a better viewing spot with only one person vs. a large group), and meet all of the characters you want.
Magically,
Stacy