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!
For mobile players you can kill it in the dungeons I forgot which one but you will find out. Then grab it’s respawn artifact thing then get a respawn pad respawn it and build stone walls around so it does not get out and escape then tranq it out the easy way is to feed berries hard way is honey. Blow this up so peeps can see it
To make honey last practically forever, make a fishing rod and equip honey, that is about to spoil, to the fishing rod, then un-equip it. It should refresh the spoil timer. Does not work with leech blood. Tested on PS4.