so sorry but that glitch doent work its only for colloseum. but i chose vaporeon and it did me well. but there are SO MANY ENEMYS WITH WATER AND FLYING TYPES so i would reccomend using jolteon. my team in XD using a link cable was Blastoise lv. 90 charizard lv. 80 charizard lv. 67 venusaur lv. 56 feraligatr lv. 31 and XD001(purified lugia).
using no link cable, for you i would use jolteon, ursaring, XD001, lapras, togetic, and houndoom. you get them all through the storyline, except or togepi, you need to talk to some dude in outskirt island. (really far in the game)