Hey there Shelby,
Welcome to planDisney and thanks so much for your question!
Magic Keys are such a great way to squeeze in more magical moments over the next year, so I'm thrilled to hear you're considering purchasing one.
Typically, you are able to upgrade tickets as long as the new tickets are of equal or greater value - and that includes the
Southern California Resident Tickets! However,
Magic Keys are subject to availability and as of the time that I'm answering this question, it does look like the Imagine Key is currently unavailable. However, you can upgrade to one of the other three keys and apply the amount paid for your special offer tickets toward this purchase.
If you'd like to make this upgrade through your
Disneyland Resort mobile app, tap the menu button at the bottom of the app and select "Tickets and Passes." Under your ticket, you should see an option to upgrade it. If you have additional questions on this process, then you can check the
Magic Key buying guide or
call a Cast Member at the Magic Key line for more detailed help with your specific situation.
Thanks again for stopping by, Shelby! Enjoy your visits to the Happiest Place on Earth.
Have a Magical Day,
Greg