"It's-a-me! Troopio!" ― xDexritosx
Goomba Stomp is a mechanic that, when you land on an enemy's head and take fall damage, the damage will be converted to your enemy, the ratio of converting damage is 1:3. For example, if you take 20 fall damage, your enemy will take 60. The name is a reference to the Goomba enemy from the Mario games