You need to get through Crevice Cave to rescue Scizor but you need to beat Froslass so you can rescue Scizor. After you rescue him, he will give you the secret rank, which means you can take on special missions like finding the 7 treasures like the Aqua-Monica, Sky Melodica, Rock Horn, Terra Cymbal, Icy Flute, Fiery Drum, and the Grass Cornet. You'll find in these dungeons:Bottomless Sea(B50F), Sky Stairway(50F), World Abyss(B30F), Shimmer Desert(10F), Mt. Avalanche(20F), Giant Volcano(20F), and Mystery Jungle(B30F).