In Mobile version, megatherium can be resurrect on the obelisk after killing it in the dungeon (plase in mobile, where you can have battle with bosses). It doesn’t live in normal world. In mobile it eats an old kibble: baryonyx egg+raw fish+potato+mejoberry+fiber. It is very important information for mobile players!
Can be picked up with quetz. Found them very quickly in the snow area. Also seems like it can gather just about anything. The buff they get for killing insects also seems to increase the damage it does on other creatures