Fake Game Boy games are relatively easy to identify, so you shouldn't have any issue knowing your way around
Some of the rarest cards throughout the Lorcana TCG are promo cards that have a very limited print, but also some of the most common or also promo cards, so it all depends on print quantity
Some cards, such as Lotus Bloom, can only be cast via Suspend since they have no printed mana cost
If nothing else, the existence of this card may see removal spells like the aforementioned Nowhere to Run take precedent since it answers the Nemesis without actually dealing it any damage
That last part is about to change, sure, but it still feels as though we could have had a day and night themed deck given that this mechanic is new to Midnight Hunt too, despite it basically being a more logical way of explaining the Werewolf transformation, and one that we hope causes an errata onto old Werewolves where possible
Yes, flip cards count for devotion, because the flipped card still has the same mana cost as the unflipped card