Consider their condition, rarity, and pricing when investing in Pokemon cards
Pokemon TCG Pocket has ten rarity tiers: One-Diamond, Two-Diamond, Three-Diamond, Four-Diamond, One-Star, Two-Star, Three-Star, Crown, Shiny One, and Shiny Two
Borrow a creature, power boost it, make it horrible to be on the receiving end of for a turn and when thats over, youre staring down a 10/10 Trample Annhilator 2
II: Create a 3/3 green Dinosaur creature token with trample
Umbreon's popularity was never in doubt, but its market price surprised even the most optimistic Umbreon enthusiast, as you'll struggle to find this card at all, let alone afford its price tag