Shadow is an enemy in Chrono Trigger that appears in Site 16 in the Future. According to the Character Library, they are ghosts of former residents. Mostly amorphous blobs of purple goop, these creatures exhibit some humanoid features such as mouths, eyes, and arms. Occasionally, they curl up into puddles, which increases their Defense. Attacking them should cause them to unfurl into the true form. Shadow share similar palette forms with Acid, Alkali, and Ion Cloud, and often accompany large groups of them in battle. The main difference is the color. Acid are orange, Shadow are purple, Ion Clouds are black, and Alkali are green.
Most physical attacks cannot hit the Shadow (receiving a "Miss" every time). However, even most physical techs (such as Crono's Wind Slash) do damage it. Use Techs and Magic when confronted with a Shadow.