Blue Orb Fragment -- When you reach the tunnel entrance, hop onto the board to the left. From this platform, jump up onto the higher one. Here, use the closest Grim Grip to propel yourself towards the second. Grab hold of the second Grim Grip to swing towards the metal sheet and Kick Jump off of it. Immediately after using Kick Jump, grab hold of the Grim Grip above to reach a higher area with two more Grim Grips.
This next part can be tricky, you have to hit these last two grips bang on to get to the Blue Orb Fragment platform. After using the middle grip, immediately latch on to the final one and you should land directly on the platform. You really need to hit the last grip as soon as you can, or you'll just miss the platform. This video is from our unofficial game guide. You can view the full guide here