The manga would sometimes reference simplistic games like table hockey or even toys that react to sound, some were more complex including the aforementioned card game against Kaiba or a chess like game using small monsters and while theres clearly some logic as to how the game plays out so readers can follow along, there is no design document explaining all the rules of these games simply because thats not what the manga is trying to do
Five games, about 17 minutes total, and about zero choices made
The Pokmon TCG: Scarlet & VioletParadox Rift Elite Trainer Box includes: 9 Pokmon TCG: Scarlet & VioletParadox Rift booster packs 1 full-art foil promo card featuring Scream Tail or Iron Bundle 65 card sleeves featuring Roaring Moon or Iron Valiant 45 Pokmon TCG Energy cards A player's guide to the Scarlet & VioletParadox Rift expansion 6 damage-counter says 1 competition-legal coin-flip die A code card for Pokmon Trading Card Game Live
Even if the expected value is positive on release day, it won't be in a few weeks
Edit: One Example I know of for question #2 is the 2000 Pokemon World Collection where they have the gold pikachu tail stamp Edit 2: And likewise there is the 2010 World Collection (and I believe these in particular would fall under #1 unless theyre variants like the 2000 collection) 1 Like exomemphiz May 6, 2020, 12:31pm 2 The Vivillons are the first ones that come to mind 3 Likes assassin5757 May 6, 2020, 12:38pm 3 exomemphiz: The Vivillons are the first ones that come to mind bulbapedia.bulbagarden.net/wiki/Vivillon_(XY_17) I didnt know about these cards, but thats pretty cool how they tried to tie in the TCG with the VG
You can use effects like Gaea's Blessing and Endurance to shuffle key pieces back into your deck to tutor or redraw later