I haven't played it for a while, but everyone moaning its a free for all, I'm sure there was an option where they couldn't kill you and vice versa. I haven't played this since about a month after release, but the one complaint some have you can change.

I personally just found it a bit boring, though haven't been back on to do any of the updated studf

Who actually plays for the challenge? It's Pokémon and is not designed to be much of a challenge in terms of the adventure. It's supposed to be about trying to catch 'em all, which genuinely is difficult. On OR/X I am currently on 711 and simply relying on trades now.

@Divisionbell: a few people have mentioned that problem, I haven't checked on him for a while so hope he is in sanctuary