Time Dokan

A Time Dokan is a special Warp Pipe that allows users to warp through time and space, appearing only in chapter 6 of Super Mario-kun volume 5.

In the future, Bowser has lost his crown and has become the maid of a bratty princess. He then meets Kāmenētā, a famous and dangerous bounty hunter that offers to go back in time and save Bowser's future. To do that, Bowser suggests Kāmenētā to use a Time Dokan to take him to the Super Mario World era. Kāmenētā is then teleported to the past without exiting from a pipe by simply appearing from thin air.