For those that don't know, the "Prerelease Raichu" card is the stuff of legend. According to reports dating back to the late '90s, around 11 copies of the original Raichu card with "PRERELEASE" text stamped in the corner of the artwork were accidentally produced by Wizards of the Coast employees. These cards were mixed in with pre-release Clefable cards that were given out at events in the '90s, and they were supposed to have been destroyed, though a few were supposedly saved by WOTC workers.