pokemon cards gx and ex

When you are building a deck, you can have only 4 copies of a card with the same name in it, except for basic Energy cards. create own business cards Also the text "Evolves from X" on Evolution cards (= not Basic) is important because it's the name of the card you can only play the Evolution card onto In your case, Lucario- EX is Basic, M Lucario- EX is Mega evolution