A Slug is a giant, colorful creature that appears in Yoshi's Story. They also have two bulging eyes. In Stage 2-3: Jelly Pipe, Yoshi can go into a pot and enter a room with a Slug crawling up, down and horizontally on the walls. According to the Nintendo Power guide, this one coated the Jelly Pipe with slime. Slugs also appear in Stage 6-4: Magma Castle.
It is difficult to defeat Slugs in combat. Many eggs are required to destroy a single Slug, as they must first be stunned by eggs exploding in front of their eyes before they can be damaged. However, once Yoshi does destroy the Slug, he will get a special prize.
The artwork depicts them slightly differently from their in-game sprite in which they are depicted with red and yellow pupils in the artwork, but have green pupils in-game. Slugs are one of the few mini-bosses in the game.
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