The last real level of the game is one of a kind and very linear. You will have to advance along the laboratory avoiding electrical discharges and activating many metal boxes that will allow you to open the locked doors in front of you or temporarily fill the gaps in the floor. Often to proceed you will have to coordinate carefully your moves. You will also have to pay attention to the bouncing jellies and some particularly tough mad scientists. To kill these scientists you will have to hit them several times with a spin attack avoiding the electrical discharges, until they fall into the void. Watch out for a sneaky pitfall about halfway through - there's a TNT crate hidden under a small pile of normal crates. So avoid hitting them with a spin attack.
There is the last Tawna bonus round in this level.
Getting the gem[edit]
Arriving at the end of this level without losing lives and breaking all the boxes you will be rewarded with the yellow gem. There are no hidden boxes, but the level isn't the easiest.