Roll Rat is a passive creature in Ark Aberration that will not bother you ... Its spawn location is marked on the map image below.

ARK: Ultimate Mobile Edition has a new map available in the game, as they go all Norse-influcned with the brand-new Ragnarok ...

Taming the rock drake on the new Aberration expansion for ARK can be quite difficult ... head down towards the bottom of the map at The Grave of the Lost, underneath Element Falls.