Other than the basic Energy cards, none of the cards included are legal for tournament play
While Eidolon of Rhetoric and Ethersworn Canonist belong to White, we might see a damage-based effect out of Red

Magikarp #47Uncommon $3.12 Dark Golbat (24) #24Rare $7.00 Dark Magneton (11) #11Holo Rare $44.05 Dark Raticate #51Common $0.60 Dark Primeape #43Uncommon $2.10 Dark Vileplume (13) #13Holo Rare $38.59 Dark Gloom #36Uncommon $2.03 Rocket's Sneak Attack (16) #16Holo Rare $21.35 Dark Kadabra #39Uncommon $3.02 Dark Muk #41Uncommon $2.15 Koffing #51Common $0.76 Koffing #51Common $7.82 Koffing #114Common $5.13 Koffing #54Common $0.79 Koffing #61Common $1.01 Koffing #62Common $1.74 Koffing #72Common $4.27 Koffing #74Common $1.25 Koffing #68Common $1.00 Koffing #70Common $0.54 Pokemon 2-Player Starter Set (Revised Base Set Reprint Run) $249.50 Base Set Theme Deck - "Blackout" (Revised Base Set Reprint Run) Base Set Theme Deck - "Zap!" (Revised Base Set Reprint Run) $499.95 Base Set Theme Deck - "Brushfire" (Revised Base Set Reprint Run) Base Set Theme Deck - "Overgrowth" (Revised Base Set Reprint Run) $685.00 Base Set Booster Pack [Revised Unlimited Edition] $786.87 Base Set Booster Box [Revised Unlimited Edition] Rising Rivals Booster Pack $371.67

My budget expired before I could do the Pasture.) Shoot, lets even toss in Spiny Starfish as a fun blocker to mug up the ground
Collectors who find rare cards typically get them graded by a company, like Professional Sports Authenticator (PSA), to help them fetch top dollar at auction
Lets think about Monstrous Rage, a card thats in Standard