Wario Land 3: Part 6: The Volcano's Base (Gray Chest)

Description:

After using a magic scroll to clear a massive tornado, Wario reaches the volcano base, breaking cracked purple blocks and sliding down slopes to find the gray key. He encounters the boss Doll Boy, who throws hammers and forces Wario to retreat; defeating Doll Boy requires attacking his flashing barrels and then jumping on him when he chases Wario. After defeating Doll Boy, Wario rides a hammer upward into a doorway to the gray chest, which contains the Lead Overalls, restoring his ground pound. The ground pound is not yet at full power, and another power‑up will upgrade it to its original strength.