Blob

W, S, S, E. S. SWITCH to the Torch, fly up to the cave (FLAME ON HIGH). REST for a bit, then THROW HIGH FLAME AT BOULDER. EXAMINE BOULDER, and, together with the re-appearance of the "Woooooo" noise. It would seem Torch is at the top of the shaft we left Thing under. PUSH PEBBLE UNDER BOULDER. SWITCH and WAIT until it appears at Thing's end. Then he can THROW PEBBLE HARD UP.

The blocks ana bullets also help Blob out, the former being used when on foot to get him over obstacles and the latter to blast away most of the aliens.