Portal Porters are a device created by Hilo in Saving the Whole Wide World. They were used to get monsters back to their home.
A Portal Porter's appearance is very simple compared to its great power. It resembles a cell phone, with a black casing, a small blue screen on the top and a red button on the bottom.
Portal Porters track if a portal is opened and what comes out. If the user of the Portal Porter is in close contact with the creature, it can identify the portal juice on the creature and open a portal that will suck the creature up back to its world.
A limitation of Portal Porters is that the larger the creature is, the longer it takes to identify the portal juice.