To tame them just crouch and walk towards it. Make sure that before hand you have about 100-150 method berries if you want to go simple like me. Put the mejo berries in your last slot and then press feed. Right after you feed it press ride and then press the button to ride again. It will feed it another Berry and let it run around with u on its back. After a while it will try to buck u off. Simply press the ride button again and it will feed it. Just keep doing that until it is tames. I play PC and so it might not work on mobile. -CyberOwl6