On eBay or Reddit, make sure you include it in the description so buyers can verify the slab on the grading company's website
Both are valid life choices
You simply pick one or two Pokmon youd like to be included, whether thats Blaziken or the adorable Raichu, and the Deck Wizard magics up a deck complete with the selected Pokmon, plus the energy, items, allies and additional Pokmon you need to bulk it up
Furthermore, if this card was sent to the GY, you can double the ATK of a Cyberse Monster in the Extra Monster Zone for 1 turn, allowing you to easily OTK
This also helps increase the number of cards "Junk Destroyer" can destroy with its effect: "Doppelwarrior" and the Summoned Tuner can be used as material for a Level 3 or 4 Synchro Monster, then the Tokens and the Synchro Monster can be used as material for "Junk Destroyer", destroying up to 3 cards on the field if a Level 1 Tuner was Summoned