Really really early in the game, as a brand new noob, I discovered a level 23 iguanodon and looked it up here. The reviews were so good that I immediately resumed the game and beat the snot out of it until it fell asleep, then tamed it with mejoberries. Now it’s my personal rank, named “Iggy.” Nothing has stopped it yet- except a gang of compys and a few giant ants. But the game crashed and when I reloaded it I had iggy back.