The Spring is a gimmick introduced in Mega Man 6. Its appearance is that of either a coiled spring or a springboard.
Springs were first made available in the devkit for the original Make a Good Mega Man Level, where they appeared in the entries The Quickening, Chroma Key, Napalm Forest and Caves, Maze of Death, Under Construction, and Mega Man World, as well as the Wily stages Cannon Deck1, Be the Bigger Person1, and Flashback Database. It has a unique appearance in Mega Man World; in Make a Good Mega Man Level Remastered, this appearance is also used in Flashback Database and Hall of Fame.
Springs returned in Make a Good Mega Man Level 2, where they appeared in 8 entries, as well as the Wily stages Water Ducts, Lever Oriental Enchanted, Unobtainium Mine, and Reality Core, the Tier X stages So Good, Mario Land, Deep Thoughts, and Swiss Hotel, the Pit of Pits sub-levels "Epic Wrap Battle", "Gambly Night", "Maze of Death?", and "Reserved Forest", and in Null and Void. Mario Land's Spring is a unique variant.
If Mega Man lands on a Spring, he will bounce off of it, bouncing even higher if he holds down the jump button. Mario Land's spring has a longer pause than normal before bouncing.