Vitani,Nala,Kovu,and Kiara were also brave. I didn't really find Nuka all that brave. ^^

Very brave.

I don't recall any of them apart from Simba and Kovu, having done anything actually brave. They just... were there. And lived.

Simba saved Nala from the hyena and Kovu distracted the crocodiles, saving Kiara. Oh, well, Nala did go back to the hyena den with Simba, for Zazu, so I guess that counts too.

But the cub Kiara, Vitani and Nuka? Whatever brave did they ever do? I bet they could've been brave (except maybe Nuka not so much) but the point is, it wasn't shown, so can we really rank them in comparation?

Anyway, I think Simba was clearly the most brave as a cub. But as said, we really didn't get to observe the others that much.

they were all brave I can't pick

He was brave...or he just acted like tough guy.

He went to the elaphent grave yard.

By far

Even though he went about it the wrong way ("being brave does not mean you go looking for trouble") he was pretty brave at the elephant graveyard. I think he was entitled to completely panicking during the stampede, but even there he managed to keep running, not get trampled, and wait for help while hanging onto a branch.

Kiara went off to explore the outlands, but I think that was due to fearlessness rather than bravery. She and Kovu were pretty brave when they got into trouble with the crocodiles (not that they had much choice!).

Also not sure if Nala's choice to go to the elephant graveyard was a brave decision or a fearless one. Bravery and fearlessness are two different things!