How to tame Diplodocus: grab a healthy amount of mejoberries. Walk over to the Diplodocus. It will try to flick you away, so walk under it. If you position yourself under its belly perfectly, the Diplodocus will not move and keep flicking its head. You won’t get flicked away and you can just sit under it and stuff mejoberries in its mouth and enjoy your Diplodocus. I just use my Diplodocus as a bus.