Other Secret Lairs have been purchasable in the Magic Online store, and theres always the possibility that specific cards get added to Treasure Chests, though thats unlikely for Universes Beyond cards that arent mechanically unique
On the front of a fake card, there will likely be no accent mark over the e in Pokmon
The set includes 172 standard cards plus 90 secret rares (SR, AR, SAR, UR)
This Golden Box Contains : 2x Pokemon Golden Box Promo Cards (Including Pikachu)
Flaaffy was the one and only Shiny Gold Card in the Japanese set Fusion Arts , so it is very likely that it will be the one and only Shiny Gold Card in Sword & Shield Fusion Strike
Theres only one set of 226 cards at the moment, called Genetic Apex, plus a handful of Trainer cards