How do you defeat the Pugilis Kingdom in Pokemon Conquest?

First, I had a guy with a darumaka. It helped with the pansage. Actually, Your main winner here is JIGGLYPUFF. It has HUGE hp, and it hits over and over and over. But if you find a guy with darumaka, I recommend it. Actually, seek out Flying guys.(at this point, your only hit at psycic Pokemon is a ralts. You'll get more psycic when you hit illusio.) Just make sure they know a flying move. Oh, and a Swadloon or a starter Pokemon(evolved) really can help. That's the way I did it, but that's just me.

I brought the mons with the longest range I could find. Then I just took all four banners and blocked the entrance. I was able to stall for enough time to win because I had all 4 banners.

I used Pokemon with long range and the code for Oshawott. Also, I had a Carnivine, Shinx, Darumaka, Eevee, Jigglypuff, and Piplup. Note that just attacking a foe can throw them off the edge and allow you to take the banner. Finally, I assigned 4 people to hold the flag and 2 people to guard the entrances. It helped alot.

Four flags 2 entrance

4x Dratini (from the code inside the game case) ruined this place, no questions asked.

A pair (or three) of flying or psychic types will shred Yoshihiro's team to pieces...namely, Rufflet (Hisahide), Zubat (link in Ignis, and don't let it evolve into Golbat--Wing Attack (super effective vs. Fighting and grass) vs. Poison Fang (normal damage to fighting)), and MAYBE Staravia (may still have Quick Attack, which in that case lowers it's usefulness considerably). I want to take the time to correct the person who said Ralts was the only psychic type available before Pugilis--that is incorrect because Jinpachi has a Chingling that you can claim once you beat Violight (or Chrysalia, one of those two kingdoms). If you do use Eevee or Jigglypuff, use them for banner-taking or mop-up duty for beating Yoshihiro's team.

Pokemon that knock targets back are useful, as well as Pokemon that can fly backup if they are knocked down.

Just use misdreavous password
Pansage is always in the back

I did just this. Put all of your Pokemon in a straight line, where the enemy begins his fight. First knock the fighting types off the edge. Then you get your Pokemon in straight line. Its harder for the enemy to win. Put darmuka first, then evee, then jigglypuff then the rest of you're team.