When way that we found to tame it was to use another tame that has a lot of health that it can munch on as bait. While a wild megalo is munching, it won’t move, plus it will leave you alone as you shoot it.
Tame the mega during the day! It is extremly slower during the day due to wanting a rest. It is a very strong dino, it has been tested to be even stronger than the allo! Be careful if you tame it at night ;) caw