I was at Card Party and I've seen four Illustrators at that one event. The reason for Illustrators ongoing popularity - and eclipsing of other, rarer cards - is due to its status
Here Comes Team Rocket In the anime and during combat, Team Rocket can't interfere with you and your Pokmon during battle, but it can apply interesting effects during combat
And then there's the serialized Golden Chocobo: Only 77 copies, with existing copies selling for tens of thousands of dollars
The deck box dividers are printed in colour with 350gsm thick art card, which makes them high quality
Originally given as a reward for those who had a winning entry in the Japanese Pokemon Card Game Illustration Contest that started in 1997, one copy is known to be held by the Official Pokemon TCG Blog, meaning only five are actually doing the rounds out there
You can do this twice too, which is an insane amount of damage