most rare 151 cards illustrated set completed (minus trainers) : r/PokemonTCG 10 Most Valuable Pokémon Cards

Professors Research can be bought from the Shop for two Shop Tickets but is available to you from the start of the game

Divide that by the total number of non-colorless symbols, and use that ratio to adjust the number of energy cards of that type

Other than that, it's fair play

The text at the bottom of the card only enhances this sentiment, stating that if a Gengar approaches you, theres no escape, and its best if you just give up

Every order ships from our Orlando facility with a digital proof before printing no surprises

I believe that we can glean a hint of the answer in Mark Rosewater's latest State of Design article, from July this year