I just got it two days ago and i already love it. Definitely worth a buy.

User Rating: 9.3 | Yu-Gi-Oh Duel Monsters EX 2006 GBA
This game has so many cool features. First of all, it has 2080 cards,which goes up to Shadow of Infinity(SOI). It also has two very waited for cards:
E-Hero Erikshieler & E-Hero Neos! Speaking of great cards, the decks you choose from at the start are the real life structure decks,1-6! Even better, the packs are the real life versions. This game has a great search feature that lets you search for cards based on their effect,ATK,DEF,stars,and other catagories. You can also do something totally unique to this game...........duel monsters;not people. This is not a bad thing,though. You can duel Kuriboh, Ojama Yellow, Cyber End Dragon, and Copycat. These duels are great because the opponents are tougher than in other yugioh games. There are many different modes of play, like the tough duel puzzles, or the endless survival duels. The images of the cards also appear on the front of the cards. Many people who are fans of the GX series will be pleased to know that the Elemental Heroes, Cyber Dragons, and even(*gasp*) the 3 Sacred Beasts, Raviel, Uria, and Hamon are included! This game was definitely worth the wait. I can't wait for WC 2007!