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The Grand Mal is a ship that appears in several branches of the Transformers franchise.
Though the Grand Mal itself never appeared in toy form, it's appearance did heavily influence the alternate modes of the two different versions of Megabolt, though those figures possessed arachnid-like legs and could be linked to Robots in Disguise Fortress Maximus.
Transformers Animated: The AllSpark Almanac II revealed that a class of Decepticon warship known as the Grand Mal exists in the Transformers: Animated continuity.