One of the biggest lost media is Pokemoa's flash dress-up for Misty. There are some remnants of it on some archive pages and you can find some screenshots buried in boorus (including some full-H edits), but the main content itself seems to be just gone.

>>57995481
Man, Sigurd was at a weird spot in time. Too early to explode in popularity or profit from it, but too short to be remembered except by some oldfags or Peach lovers.