It doesn't matter if you want to sell or keep your Pokmon cards
Instead, you can engage in rudimentary battles against AI and other players, open packs by waiting for the timer or rushing it via Hourglass objects that you get your hands on by completing missions, and these tend to complete themselves just by you playing
This is just with vanilla creatures that don't have any other effects
Agate Instigator Bushy Bodyguard Coruscation Mage Darkstar Augur Finch Formation Flowerfoot Swordmaster Intrepid Rabbit Iridescent Vinelasher Manifold Mouse Pawpatch Recruit Prosperous Bandit Rust-Shield Rampager Splash Lasher Starscape Cleric Steampath Charger Steelburr Champion Tender Wildguide Thornplate Intimidator Thundertrap Trainer Warren Warleader Zinnia, Valley's Voice Best Offspring Cards #5
However, at some point around 2003 or 2004, he did get a deluxe edition set that packaged his starter deck with two Labyrinth of Nightmare booster packs and a deck box
In PTCG Live, players are limited to redeeming up to 4 codes