Ma! There's a weird 'nuki in the yahd!
Ability: Speed Boost
EVs: 236 HP / 60 Atk / 40 Def / 172 Spe
Rock Slide / Protect
The speed EV's given allow Scolipede to outspeed threats such as Mega Charizard X, Dragonite, Gyarados, and Togekiss. However, it still can't outspeed things like Talonflame, Espeon, and the typical set for Mega Charizard Y, unless it uses Protect first turn to get the Speed Boost raise. 36 EVs in Attack are enough to OHKO Heatran and 2HKO Bisharp. Honestly, I'm not sure if this is a good set or not. I know that Mega Charizard Y is a problem, but I plan on using Assault Vest Goodra with this guy. What do you think? Anything I should change? Should I use Rock Slide or Protect?
Aside from the defensive EVs that's pretty much standard I think. I think they typically go for just straight 252s. As for which move is better, that's up in the air; Rock Slide gives you great coverage with Earthquake, but Protect ensures at least one turn of Speed Boost. I guess it really depends on your team; if you have a lot of things that can handle something that's faster than Scolipede it may be better to use Rock Slide; that way he switches out if the opponent is faster, stays in and attacks on slower opponents, and Swords Dances on opponents that would more than likely run away from him. If most of your team is fairly slow as it is, you may want to give up that coverage for Protect, maybe even trade Poison Jab out for X-Scissor to make up for it.