Like most other cards on this list, the degree of error here is what defines the worth of your card (also if it has that big orange lizard on it, it's probably worth a few cents regardless).
The card features Tsunekazu Ishihara, the president of The Pokemon Company
The theme of this MTG Commander deck focuses on green stompy magic and is led by the powerful Lord Windgrace
It's pretty normal for a Magic: The Gathering card's estimated price to drop precipitously after the set is actually out, but there's always a few exceptions, and the uncommon spell Stock Up is the latest of these
Graded Population Report: Rattata #61 Visualize the distrbution of grades in the chart
Previously, Kaladesh Inventions, Strixhaven Mystical Archives, and Brothers War Retro Artifacts have all done similar things by releasing alternate-art reprints of old, high-demand cards