uhh huntfor a pretty good pokemon, preferrably one thatis a high lvl, train it and give it sme good skills, a legendary would be great, unless you already have them. i havent played this game so thats all i can say because i had the same problem on ruby lol. i found that having a salamander was great, and lol lvl 100 zigzagoon

@itsnear:i have no level sixtys and my dialga stinks only level 51 but i finally beat lucian got chrushed by spiritomb then i sent out my happiny she did lots of damage to gastrodon then died agianst muddy water on gastrodan so yeah i'm sucking it up

Definetely TRAIN TRAIN TRAIN. It took me a few times to beat the Elitle Four, and after every time I lost, I went and trained my Pokemon. I finally won after a lot of traning, and when I put Dialga in my party . Get your Pokemon at level 60+. It may take a while, but it's worth it (I think).

It has too be like level 60 and some of your other pokemon have to be at a high level too.