These cards were awarded to winners of a Pokemon contest held in Japan in the summer of 1998
Goat Control Time for a bleat-down Goat Control, during its prime, was the dominant deck in one of the final vestiges of competitive Yu-Gi-Oh
Once per turn, when this card destroys an opponent's monster by battle and sends it to the Graveyard: You can attach that destroyed monster to this card as Xyz Material
Youll find the Ho-Oh promo card at: GameStop (US) EB Games (Canada, Australia) Look for the Keldeo promo card at: Hot Topic, Barnes & Noble, and BoxLunch (US) The Delphox promo card can be found at: Best Buy (US) Mr Toys and Toymate (Australia) JB Hi-Fi (New Zealand) The Keldeo and Delphox promo cards will feature the Mega EvolutionChaos Rising logo, and the Ho-Oh promo card will be emblazoned with the retailers logo, making them unique additions to your Pokmon TCG collection
Others, like any monsters from the extra deck, either require the player to have a card like polymerization in their hand or specific monsters to use together
"Black & White Plasma Storm Rulebook" (PDF)