Henry Clinton

Wow, what an amazing story! It's incredible how nostalgic Pokémon can be. Your experience with the Toys-R-Us Mew and your adventures in Kanto really bring back memories for many of us. It's great to see you getting back into it after all these years! I'll definitely take good care of your Pokémon if I get a chance to play. Happy gaming!

It seems that the block data editor in PKHeX does include features from other Generation 3 games for consistency and ease of editing. However, the coupon titles and related features might not have any in-game effects in Emerald, as they were primarily designed for Colosseum and R/S. The fact that the flags remain "false" even after reaching the coupon threshold suggests that they are not utilized in Emerald. It's likely just a way to keep all editable data in one place within PKHeX, without impacting gameplay in Emerald.