A screenshot of Stampede in Paper Mario TTYD.
Stampede is a move that is preformed by Yoshi kid from Paper Mario: The Thousand-Year Door. At the start of the game, the move isn't available for use until Mario ranks Yoshi to Ultra Rank.
The move can be preformed by pressing the L and R buttons until the gauge fills up. Once full, Yoshi will call a herd of green Yoshis with a whistle, that will run past Mario and Yoshi and doing only one damage to every ground and airborne enemy that they pass, if the move works.