I have a tip for mobile player as I am one myself. I found 3 of these guys sleeping the in the Artifact of the clever cave. Make sure to bring sacrifices and a level 2 One has 1024 heath! Also bring loads of ammo and a good gun. I killed one using a crossbow and arrows to the tail as my dire wolf died and onyc’s destroyed my rifle. Bring Reloads of armor and extra cause your armor is nothing. ( I had chintin ) Also make beds to respawn. Kill the megalo and take it’s implant!!!
Fun fact: megalosaurus (name translates to “big lizard”) was the first true dinosaur found. Discovered by Richard Owen, he thought it was quadrupedal (walked on all fours) and resembled a crocodile-lion cross. Later he would correct his data and soon classify this group of extinct line of ancient lizards as “Dinosaurs”.
Whatever you do, do not get close to it with pretty much any medium dinos or fliers because these thing can pick up fricking argies and monch them to death so keep a good distance between them, you and your tames. Trust me on this i lost a lot of things to these monsters.