Creature types like Dog, Dryad, Mercenary, Kraken, Barbarian, Dinosaur, Goat, and Illusion saw their debut in this set, either naturally or via errata
(sure to remember these cards) know and love the Dark Magician, and his counterpart Dark Magician Girl
Because I haven't reviewed either Eevee cards from this set yet I won't talk now about which one of those cards are best to use, but regardless of which one you use, if you want to use Jolteon in a deck, I would recommend you set Jolteon up on your bench, that way you can put two energy cards on it there, and keep it on your bench to prevent your opponent from using EX Pokemon or if they do choose to use EX Pokemon, moving Jolteon into the active Pokemon spot and use Electri-Defuse so that that EX Pokemon cannot attack
Your goal is to outlast your opponent by shrugging off their damage while applying your own pressure