Step 1:you tame the dolphin shark thing that’s a passive tame (they eat meat)
Step 2: you get at least 10 more tranqs than Dododex says (in case yah miss)
Step 3: get dolphin shark thing saddle
Step 4: go of the edge of the huge drop off in the ocean on yah dolphin shark thing
Step 5: start shooting
This method ensures that the bronto won’t attack you when you start shooting it. I’ve used it before and am currently taming a lvl 17. Don’t worry about megs, from what I can tell, they don’t attack you if you’re riding the dolphin shark thing, I sat right next to one on mine (sorry Fire Fin). Mantas won’t attack either.