Or you can cheat if that is your goal
. Two options here: Using RPGMakerSaveEdit allows you to open your save file and adjusting the numbers, in this case giving you the item Costume State Changer & Fixing Scissors; The other one is to use the plugin called RPG Maker MV Cheat Menu. Once a game is loaded, hitting the 1 key brings up a menu allowing all sorts of things from god mode, changing stats, changing states & variables (be careful here), adding items/equipment, making the enemy hp 0 (useful when I needed to test), etc.
Including both if you choose to go this route. If using the cheat menu follow the instructions inside the cheat menu folder.