Hello, Meenakshi!
Thanks for stopping by! It's a pleasure to have you here at planDisney!
I'm glad to share that you will be able to make this upgrade once you get to the Disneyland Resort if there's availability for
Park Hopper tickets when you visit. To make this change, you have to visit the Disneyland Resort Main Entrance Ticket Booth and talk to a Cast Member.
Since you're planning on park hopping (which I love to do at the Disneyland Resort), don't forget to consider
Disneyland Park and
Disney California Adventure Park attractions when you're thinking about your itinerary. It's also interesting to look at
park hours in advance because that will help you maximize your day!
I hope this helps you create an extraordinary day at the Disneyland Resort, Meenakshi!
May the magic be with you,
Julie