g power is useless pretty much =/ the way i won was i used level 10 omega leonidas ~earth~ level 10 delta dragonoid level 10 storm skyress
gate cards falconeer ~yes useless i know but rubbing battles are by far the easiest to win~ sand storm for the boost on all of them stand your ground ~make sure you use your scarth battle redo first~
ability cards scratch battle redo prevention ~just incase cause it's pretty easy to auto win against his weaker bakugan~ my last card was power triangle for filler
the strategy is simple first use your falconeer gate card and throw storm skyress and then on nardus turn he either fights you or land on his gate card if he lands on yours hope you win the rub battle if he lands on his you should just use delta dragonoid or omega leonidas and use scratch battle redo. Then he'll either play a new gate card or fight your skyress on falconeer gate card which you should win. Then play stand your ground and he'll fight you and you win. or at least that's what i did
well since your leonidas is haos i suggest using hammer gorum or the best earth bakugan you can get
red joker:3867-2193-4043(japaneezy) black ace:4640-6968-9201(english) platinum 2493-0945-8023(for trades only) soul silver 4554-9365-8904
The way i beat him with my haos O. Leonidas was, one with a double attack card, and one with a skip battle phase card. i struggled but i managed to win one round which was a rub battle. didnt use any ability cards.. but yeh haos has a bug disadvantage in this fight
your bakugan is haos so use: a useless gold gate card that works the best for haos. (i've chosen Pyros so i used Gargonoid) a silver card that works the best for haos bakugan a bronze card that works the best for haos and it must have a nice effect Double Input Haos!!! Maybe prevention. it worked for me. and the Pyros, Aquos, Haos combo card. but use it only is your other bakugan are Pyros and Haos. you can't use them, but they are still in your deck!!! if not, use Flash. Defeat him first with a deck that is good for all your bakugan and change it before the final battle to a Haos Based Deck!