(note: this guide currently does not include all crystals)
Go up-left until you find the crate. Push it all the way right, up one, then push it up towards the tall platform above. Push it into the water next to it. Leap up, take care of the Dantini and head on to the next area.
Move the three boxes above to their respective grates. Follow the track above and leap to the next area, avoid the Dantini and leave this area from the top. Here, leap onto the tracks and turn left, grabbing the Blue Crystal along the way. Continue left, up and finally right, where you should be at the top right of the level. Defeat the Dantini and leave at the top screen again.
In the next screen, continue up, leaping over to the signpost. To complete it, you'll need to press the buttons in the order shown. Tail swipe the machine and ground pound them as needed. If entered correctly, the three lights will light up together. If not, the switch needs to be hit again. The order is:
Now leap back to the platform below and follow the track off to the right. Continue following the track right, leaping over the missing areas and defeating the Dantini at the bend. Leap to the platform below and leave to the right.
In this area, move right (all the way if you want a large crystal) and leap to the platform above in the center of the area (with a rock on it). Move right and leap across. At the far end go up, taking care of the Dantini, and ground pound the switch. Move back to the rock platform and move up the bridge that has appeared. Ground pound the switch. Get ready for backtracking - All the way back to the bottom left of the screen.
Now go up and follow the track back, follow it left and up, then turn right as the path leads you. Leave at the top of the screen.
In this new area, pick up the barrel and throw it at the rocks. Pick up the next barrel and throw it at the rocks on the right. Pick up the third and throw it at the top rocks. Go through here, and the Gobbo's brother will be waiting for Croc to rescue him.
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