Use the crab near the bottom right door. Only one spring ball jump is needed, it is to get up onto the flat platform. After the spring ball jump, if the crab did not follow, go to the lower ground a bit to the right, jump and aim down to lower the camera to lure the crab. Note: The hardest part of this climb is the pixel precision when jumping around a ledge. Too many pixels: left is a fall, right you clip through the crab, low you miss the jump and fall, high is a bonk or crab clip.