Melody Response Cannon (メロディ対応砲台 Merodi Taiō Hōdai) is a puzzle trap guardian that appears twice in Astro Man's stage in Mega Man & Bass. It makes some buttons in the room flash (similar to the game "Simon"). The player must match that pattern or the guns start to shoot. After solving the puzzle, the door opens and the player can proceed.

The second Melody Response Cannon in Astro Man's stage

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