Pokémon Colosseum

From Wales, 4 posts

If you've failed to catch a shadow pokémon during battle with another trainer, cos you've accidentally killed the Shadow Pokémon, all you have to do is leave the area and then come back. The trainer will want to fight you again, thus giving you another chance to catch the shadow pokémon!

From Milton Keynes, 8 posts

But you can't get Sneasel again in the same area, so where is it