Once the Monster has been chosen, the enemy will also remove all copies of that card from the GY and banish them
That does require you to have access to both extra mana to cast multiple spells in a turn as well as lots of card draw to keep your hand full at all times
Pokemon Trading Card Game 2 was never officially released in English, but dedicated fans have created a full translation patch for the original Japanese Game Boy Color title
Want to pull one of these cards yourself
For example, if you control Traveling Chocobo ("You may play lands and cast Bird spells from the top of your library.") and Jidoor, Aristocratic Capital is on top of your library, you can play Jidoor, Aristocratic Capital, but you can't cast Overture
Switch the original ATK and DEF of all face-up monsters on the field until the end of this turn