Bem-vindo ao planDisney panel, Matheus!
Thank you for stopping by with an excellent question. It is always a pleasure to help a fellow Brazilian plan a pixie-dusted Disney adventure.
Guests visiting 
The Most Magical Place on Earth can enjoy 
complimentary transportation throughout the Walt Disney World Resort, including transportation between theme parks. If you plan to use Disney transportation, I believe the easiest way to travel from Disney’s Hollywood Studios to Magic Kingdom Park is by taking a bus from Disney’s Hollywood Studios to Disney’s Contemporary Resort and then walking from the hotel to Magic Kingdom Park.
When I am not in a hurry, I like taking a bus from Disney’s Hollywood Studios to the Transportation and Ticket Center and then taking a ferryboat or the monorail to Magic Kingdom Park.  If you ever have time to explore Disney transportation, you can also take a water taxi from Disney’s Hollywood Studios to Disney’s Beach Club Resort and Yacht Club Resorts and then take a bus to Magic Kingdom Park. Another great option is taking a water taxi to EPCOT, then using the 
Disney Skyliner to travel to Disney’s Riviera Resort, and finally taking a bus to Magic Kingdom Park.
planDisney tip: If you are okay with paying for transportation, the fastest way to travel between these two parks is by requesting 
Minnie Van Service via the Lyft app or using another rideshare service.
I hope this information is helpful, Matheus. Next time you visit us, stop by 
planDisney in Portuguese. It will be a pleasure to continue to assist you in our beautiful language.
Saudações mágicas,
Thiana