Instructions
Access your game menu by pressing the "Triangle" button. Select the "Item Command" option in the menu.
Select your "Porta Potty" item to try and give it to your Digimon. While the Digimon will usually accept the Porta Potty, it may also refuse. If it refuses, move to step 3.
Press the "X" button near the Digimon to interact with it. Select the "Scold" option to scold your Digimon, and repeat steps 1 and 2 until the Digimon accepts the Porta Potty.