Lizard Rick is a lizard person and the paternal grandfather of Lizard Morty. He first appeared in the Season 3 premiere episode, "The Rickshank Rickdemption", and can be spotted crawling on the walls of the Citadel. He also appears as a trainer and a purchasable avatar in the game Pocket Mortys.
It is likely that he died following the events of the Citadel's collision with the Galactic Federation prison, since his Morty is seen alone, attending Morty Academy with other Rickless Mortys.
Lizard Rick is a purchasable avatar in the game Pocket Mortys.