Bottled Nightmare

Bottled Nightmare is a Grotto Beast from the Grotto Beasts trading card game. Its body is an amorphous black mass of arms, encased inside a big glass bottle. Visible behind the glass is a set of big cartoon eyes. In the Grotto Beasts cartoon, Bottled Nightmare is first encountered in the beach episode, where it washes up to the shore in its eponymous bottle. When the Grotto Gang goes to check out the mysterious bottle, Bottled nightmare suddenly cracks open its bottle and begins to spill out, reaching for them with his hands. At first, the Gang attack Bottled Nightmare, assuming it to be an evil creature. This causes all kinds of hyjinks, until they finally find out all Bottled Nightmare really wanted was to give them a hug.

During the episode, it is revealed that Bottled Nightmare's glassy exterior is very strong, and that Bottled Nightmare can even use magic to repair any cracks in the glass. This explains why, in the trading card game, Bottled Nightmare's defense and magic stats are so high.