East Coast had three "winners" (monsters used when the competition looked stiff). I don't know what the other three were, but I recall an Articuno with Agility...
This is probably what anyone on this board would face:
max speed, near max or max on everything else.
max PPups for all moves.
Always throws out a sub if it can afford to, when played correctly.
max speed, other stats probably high.
Jolteon leads, (even though I have a grass and a ground on my team), and throws a toxic out, in general. Against my Sandslash, however, he retreated, facing me instead with:
Double Team (*not* Minimize)
Again, the purpose seemed to be to poison the enemy, though like cron, it throws out Double Teams whenever it can.
When you test these monsters against yours, you owe it to yourself to max them out on stat EXP and genes. The ones they had were close to perfect, and you shouldn't rely on the weakness of your opponent in general.
Hope this helps,