User blog comment:Mckrongs/Jinouga Subspecies Discussion/@comment-125.162.226.71-20111120095850/@comment-1011548-20111128222316

Yeah, I always interpreted it that Tigrex mainly lived in the Desert and wandered up into the Mountains to eat Popo only occasionally (which would make even more sense if Desert 2 is actually a rainshadow desert of the Snowy Mountains...). Plus it lives in the Desert, which is freezing cold at night, so it's not like its unaccustomed to low temperatures.