Giant Purple Griffin

The Giant Purple Griffin was one of the original Megatron's more ridiculous creations, a giant, flying, building, shaped like a Sphinx with wings and a bird beak. The Giant Purple Griffin had a mane of ambulatory tentacles that could be used to grasp at opponents.

It is unclear exactly what Megatron planned to do with the Giant Purple Griffin (aside from the obvious "conquest"), as it was destroyed by the Aerialbots before he was able to put it to good use.

From Teletraan I: The Transformers Wiki, a Wikia wiki.