Number six. Here's the story.
After leveling up my Croagunk in his gym and other annoying places to develop a Manene/Croagunk strategy thinking he would use, you know, STEEL TYPES, I finally get to the top of the gym and what does he go and use first? That freaking Hell demon Bronzor. I spent an hour and a half screaming at my DS after that because I had to switch out Greggle and use Kricketune, who's Sing just would. not. hit. Meanwhile, Reflect has worn off, the thing has pwn'd Kermit, and I haven't done a thing to him. So it all went downhill from there.
Eventually it ended. The whole team died, I sceamed some more, I black out, and then we heal and head back to the Gym with more Revive on hand. Things went better this time. I planned ahead for his Bronzor and of course he didn't use it, so he that advantage over me and took out another pokemon or two and wasted several turns, but eventually I got back on track and managed to knock out Steelix (who was a piece of cake with Manene+Greggle) and the demon thing, and then he brings out this darn tank-looking guy. I whale on him repeatedly with my usual big hitters, which does nothing at all. Eventually they all end up fainted and I'm left with only Manene. Against this giant dinosaur-thing.
The matchup actually looked kinda funny in a bizzare, sad, sort of way, but believe it or not, Manene was the most effective out of my whole team against him, mostly because he used a Special attack and had Reflect to protect himself. It was a pretty intense battle, and right at the end it looked like poor Geordi was dead meat - but then I discovered that Psybeam has the added effect of possible confusion. Nice. So dino has two hits left on him and doesn't hit Geordi. Geordi hits dino and it looks like the win is ours! Until... Rock Slide. Bugger.
So I scream some more, heal again, and rush back with still more revive. And long story short, with a little calming down and the hard-earned knowledge of Byron's strategy, I beat him on the third try thanks to Kricketune's handily defeating the Hell Demon with a well placed combo of Sing/Screech/X-Scissor. The end.
The other gyms were all easy.