It’s real. It’s from the Super Trainer Showdown in 2001, New Jersey
Apparently I got a “callout” on instagram over this post for saying this autograph is fake, despite saying 4 posts later that I am probably wrong.
For the record, this thread predates the general public awareness of this version of his autograph. In fact, this thread was one of the pieces that helped put the puzzle together. I’m adding this post as context for anyone who finds this thread in the future.