|This article lacks an official name. "Yapool's Dimension" is simply how it is referred to as, due to the popularity in the fandom or how it's mentioned in-story.|
Yapool's Dimension or the Alternate Dimension, is the home world of Yapool and his Choju. It is also where he creates his Choju. The dimension appears to be very small, but large enough to hold its own atmosphere, made up of red air and dark clouds. Whenever Yapool is observed, his psychic energies make the atmosphere glow and warp in many different colors.
In Ultraman Mebius, Yapool used his dimension to create a giant pocket dimension. This dimension depicted an apocalyptic version of Earth and was at least the size of a large city.