In the 1800s, Jerry the Mandrill was taught to drink and smoke ... tool was hidden three years after performing a task with it. Monkeys and apes are essential to the health of the forest.
Clearly Simba's not a baboon. But neither is Rafiki. He's a different kind of monkey altogether — a mandrill. And what's more, Rafiki has a long tail, yet in real life mandrills are nearly tailless.