They are not legal for tournament play, but WotC is not opposed to proxies in casual settings
Acid-free and chemically inert plastics "Acid-free" is primarily a paper storage term, but for plastics, the equivalent is chemically inert, meaning the material won't react with inks, coatings, or the card surface itself
How to get Mew in Pokmon TCG Pocket explained It's still rare
3 Elemental Hero Stratos is the Foundation For Modern Normal Summoning The First Iconic Archetypal Combo Starter In the modern era, normal summoning is still an important part of the Yu-Gi-Oh
For example, Mew VMAX can now attack with one single attachment without relying on Elesas Sparkle (yup, sounds scary), Mad Party has the possibility of making a comeback, and who knows if Togekiss VMAX will start seeing the play from now on