Against Silver team of Greta, correct?
You should pay attention to Natures, as they are advantageous.
Blaziken
Lonely/Naughty
-sky uppercut
-Swords Dance
-Rock Slide
-Fire Blast
Dragonite
Quiet
-Focus Punch
-Substitute
-Thunderbolt
-ice beam
Dragon Dance only powers up Aerial Ace. Ice Beam and Dragon Claw do the same job, so you don't need both.
Snorlax
Careful
Thick Fat Ablity
-shadow ball
-Curse
-rest
-Return
All three are best with Leftovers, but since there are item restrictions in the BF, you will have to give them Berries/other items.
The order of the team doesn't seem exactly safe. E.g, An Aerodactyl can sweep Blaziken and Dragonite with STAB Rock Slides. Bulky waters like Suicune can also pose problems for the first two. Then you will only be left with Snorlax alone to defeat the rest of the opponent's team which may not alway result in your victory.
