I asked for 6 members, no NFE's and only Kanto Pokémon.
My team when I'm going to beat the Champion has to exist of: Charizard, Farfetch'd, Vaporeon, Magneton, Omastar and Zapdos. Pretty much a good team if you ask me.
It's going good. I just reached ever grand city and started to train my team up to lvl. 50 inside the start of the cave before I go further and defeat the trainers inside.
Sapphire is one of my favourite games, so it's pretty fun to play it in a challenge. Not too hard of a challenge to be honest, but have never done challenges before so I decided start easy. :D