Rolling Stones are hazards first appearing in Crash Bandicoot, rolling sideways on a rail in two levels.
Rolling Stones appear in the levels Jungle Rollers and Rolling Stones, where they can be found sometimes with one or two stones. If Crash is hit with the stone without an Aku Aku mask, he will get flattened. (This is changed to the angel death in the N. Sane Trilogy)
Rolling Stones appear in the snow levels, Snow Biz and Cold Hard Crash, where they appear at the end of both of the levels, using the same patterns from the previous game. Rather than getting flattened, Crash will turn into an angel if he is hit by one.
Rolling Stones appear in the remastered versions of Crash 1 and 2, where they serve the same purpose as the original games.