The Fossilized Dino (Japanese: カセキのクビナガ Fossilized Plesiosaur) is a Fossil introduced in Generation VIII. It is the counterpart of the Fossilized Drake.
If brought to the one of the following locations alongside a Fossilized Bird or Fossilized Fish, the Fossilized Dino can be regenerated into a Arctozolt or Arctovish, respectively.
A Fossilized Dino appeared in JN050, where Ash, Goh, and Chloe helped Cara Liss and Gasattsu to dig it up in the Wild Area. It was later combined with a Fossilized Bird and restored into an Arctozolt.