The DoriTama Rainbow is seen in episode 50 of GO-GO Tamagotchi!. Mametchi invented it to create a faster method of travel between Tamagotchi Town and Dream Town after they seperated from DoriTama Town. The train is shown to be able to travel on water. Mametchi states that in the future, he wants the DoriTama Rainbow to be able to travel all throughout Tamagotchi Planet, and even to outer space and other planets, including The Earth.