|Dromaeosaurid Theropod Grundalychus|
|[List of appearances]|
Grundalychus, otherwise known as the Grundal, were Dromaeosaurid Theropods that roamed Ninjago before extinction. A Grundal was known to have been resurrected by Lord Garmadon. He did so by bringing its skeleton, which was stored in a museum, back to life using the Mega Weapon. When the potion was used, the Grundal was sent back to his own time, meaning he was destroyed at the present.
Grundals were said to have hides tough enough to withstand ordinary weapons. They were also nocturnal, hunting at night, rumoured to only be destroyed with light.