Last we saw Swamp Thing on a Garbage Pail Kids card was in 2014. Now he’s back, amongst the “Oh The Horror-ible 80s Sci-Fi” series of sticker trading cards. Swampy is represented by, Swamp Bing & Sammy Swamp. Sammy Swamp appears to be some sort of booger variant card. Look for the cards in stores.
Card 1a: Swamp Bing
Card 1b: Sammy Swamp