Reserved List Booster Boxes While everyones definition of a vintage booster box will vary, main set releases from Alpha to Urzas Destiny are the only ones that contain cards from the oft-cursed Reserved List
"The Baby and the Bathwater"
Arcbound Bruiser Arcbound Condor Arcbound Crusher Arcbound Fiend Arcbound Hybrid Arcbound Javelineer Arcbound Lancer Arcbound Mouser Arcbound Overseer Arcbound Prototype Arcbound Ravager Arcbound Reclaimer Arcbound Shikari Arcbound Slasher Arcbound Slith Arcbound Stinger Arcbound Tracker Arcbound Wanderer Arcbound Whelp Arcbound Worker Blaster, Combat DJ Blaster, Morale Booster Modular Monstrosity Power Depot Scrapyard Recombiner Zabaz, the Glimmerwasp
Pinpointing the exact oldest Pokmon card can be a complex task due to various factors
if you assume, on average, you're drafting 31 playables for your deck (23 spells, 5 lands, 3 sideboard cards) then approximately 10% of your cube could potentially be strong sideboard cards and the resulting decks would be 'more powerful' than a cube with no sideboard cards