If another ability of a source you control triggers when attackers are declared, such as that of Hamlet Captain, you may have it resolve before or after that of Hanweir Garrison or Hanweir, the Writhing Township
Enhanced Boxes actually hold a lower Market Price than regular Booster Boxes right now, despite coming with this promo card, which suggests that fans arent as enthused about this promo as its recent spike would suggest
In fact, a lot of the positive energy and continuous love for the franchise comes from fan creations from within the Pokmon community rather than solely from the original products by Nintendo
What attacks does Tinkaton have
Personally, I would recommend you stay away from these unless you really want to collect them
Conclusion: From Guesswork to Knowledge Pricing Pokmon cards is a skill, and like any skill, it gets easier with practice