A Dome Fossil in A Night in the Nacrene City Museum!
In the main series
Dome Fossils were first seen in Shell Shock!. They made up the structure of the island Fukuhara Island No. 4, and were revived into Kabuto in red moonlight, causing the whole island to collapse and sink.
In A Night in the Nacrene City Museum!, a Dome Fossil was first seen chasing Hawes, as he claimed it to be doing, but was later seen safely placed in a display case. Hawes later explained what it was to Ash and his friends. It was later revealed that the Yamask in the Nacrene City Museum was using its move Psychic to make the Dome Fossil float and chase after Hawes after he put its mask in a display case, thinking that it was a replica Yamask mask given to him as a gift from the company that made a Cofagrigus replica after purchasing it from them for the museum.
Both the Dome and Helix Fossils appear on the artwork for the Mysterious Fossil card. However, the artwork depicts the Dome Fossil as the Fossil of a Kabutops, Kabuto's evolution, rather than of a Kabuto. The two Fossils were later split off into their own individual cards.
Related cards Cards listed with a blue background are only legal to use in the current Expanded format. Cards listed with a silver background are legal to use in both the current Standard and Expanded formats.