system
Given the following post, respond as if you're commenting on Reddit:
human
X-post from r/[Pokémon] Are all fossil Pokemon part Rock-type because they were fossils or because all Pokemon from their era were just Rock-type by default?
gpt
Perhaps only rock-type pokemon are likely to make good fossils? Fossilized creatures on earth are the one-in-a-million that happened to leave their bodies somewhere that would preserve them intact long enough for the mineral-replacement process to happen. The grass types from long ago probably just left very few fossils compared to the rock types.