The only other game besides DKC I know of with something like that is in 1-1 on Demon's Souls. Turn around from where the Archstone takes you, and there is an item behind some rubble toward the wall/gate. It's not as cool as a secret as the banana hoard tho.

I bet it's much more common in newer 2D platformer games just because of that, though. I don't really play those myself.