To get to the Frog and the Emerald as Tails in one step do as fallows. After riding the trolly to the Aztec Forest you should be standing up high on a platform overlooking the forest. If you stand on the edge and look down and to the left you will see two trees sticking out of the canopy that are close together. Fly toward the trees and land next to the one that is closest to the ledge you jumped from. You should be standing on top of the canopy. Walk around the first tree until you fall through the canopy and end up right by the emerald and the frog.