Add-on Best mobs for MCPE

The Amazing Mobs Add-on replaces 11 mobs in Minecraft Pocket Edition with some of the most amazing mythological creatures. Most of them you will be able to tame and keep as your pet. And some of them, such as the scorpion, you will be able to ride like a horse. Let one of these awesome companions join you on your next adventure!
The Manticore (replaces the cow and mooshroom) is a mythological beast with the body of a lion and a tail of a scorpion. The adult ones are hostile and will lash out with a poisonous attack if the player gets too close.

If you find a little one (a baby) then you can use any kind of raw meat to tame it. Continue to feed it until it has grown to full size. You can then use it as a mount and control it by the use of a stick.