The Time Slipper first appears in the chapter "The Time Slipper" and the episode "Great Adventure with the Time Slipper"; where Senbei finishes the machine and Arale Norimaki ends up using it and later returns showing it was a success. In the chapter "The Mysterious Egg" and episode "What's with the Egg?!", Senbei, Arale and Peasuke Soramame use it to take a trip to the prehistoric ages where a Prehistoric Soramame Ancestor gives them an egg that hatches Gatchan. In "A Far and Distant Seashore", Arale, Akane Kimidori, Peasuke and Taro Soramame use it to go swimming at a beach in the past. Senbei, Midori, Arale, and Gatchan use it to go fifty years in the past after returning from space in "The Dumbfounded Doctor", due to Taro and Akane playing them a joke, portraying older versions of them