Oh, not the main story. I only had it's 2nd evolution at that point, and mostly because I have a thing for dragon type pokemon... I might have still had a Duosion at the Elite 4 as well...
No, all EV gains will be factored in, even if you gave it all to the pokemon at level 100 via feathers.
118 with a +speed nature, 108 with a neutral nature.
1 each.
It should be noted that you can use them if you have over 100 EVs, unlike the Medicine items.
I'd assume that it'd compound since they're seperate boosts, unlike an un-STAB'ed SE EQ being boosted at once to 200 BP, for example.
No, it only stops like that when the opponent is immune to the attack, i.e. Thrash on a Ghost.
I believe it does stop actually, from an experience in the Battle Subway. I think it's more complicated than that, though, but I can't remember why I think so.
No, I've used my Walrein's Protect to stall out Outrage before. It simply wastes a turn, then it continues next turn (or if the Protected turn was the turn it'd end, then they get Confused like normal).
Um, I'd go Scizor over Escavalier, as it is faster, and can be deadly with any of it's sets. A Bulky Swords Dancer can provide extra sweeping potential, or if you want a Bulky Dance Passer can help someone else sweep. Otherwise coverage moves like Superpower and Pursuit can give a very potent physical attacker.
Ask the Wi-Fi Forum. Someone may help you...Unless I've misinterpreted your question.
Chople Berry, and yes.
