Serperior or Butterfree?

[CaptainNikolai 1]

I'm trying to figure out which Pokemon will fit the last spot on my team. I have a soft spot for Serperior, as it is my favorite 5th Gen starter, but with the Contrary Ability not working and with a low Special Attack stat anyway (my plan was Leaf Storm sweeping), I'm thinking of ditching it. However, it's current moveset and its decent Attack stat does warrant it as a physical sweeper. But my Butterfree is only a few levels from learning Quiver Dance, and that'll definitely make it a force to be reckoned with. So, based on my team, who supports them better: Serperior or Butterfree?

Main Team
Cthulu the Omanyte
@Everstone (evolution on hold until level 55)
Level 40 (currently in training)
Modest Nature
Shell Armor

Mud Shot
Ancient Power
Protect
Brine

Mauna Loa the Camerupt (Shiny)
Level 48
Rash Nature
Solid Rock

Flamethrower
Earth Power
Earthquake
Yawn

Don Poe the Honchkrow
@Leftovers
Level 42 (currently in training)
Jolly Nature
Insomnia

Haze
Brave Bird
Roost
Faint Attack

Sir Kibble the Gallade
@Silk Scarf
Level 48
Lonely Nature
Steadfast

Rock Smash
Swords Dance
Slash
Psycho Cut

U.F.O. the Magnezone
Level 48
Relaxed Nature
Sturdy

Charge Beam
Metal Sound
Flash Cannon
Discharge


Fight for the Last Spot

Walter the Serperior
Level 47
Serious Nature
Contrary (currently not working)

Slam
Coil
Leaf Blade
Leech Seed


Pinkberry the Butterfree (Shiny)
Level 43 (am willing to train)
Modest Nature
Compoundeyes

Sleep Powder
Shadow Ball
Psybeam
Bug Buzz

[The Radiant Aeon 7]

Hmm.. While Serperior has its merits, Butterfree having quiver dance is far superior (heh "superior" "serperior") However, that isn't to say that skipping out on Serperior is A-OK. Physical Serperior is actually decent and that movepool is adequate (If only it learns aqua tail from move tutor. Work on that Ame!)

But, if you want a special attacker (why though since you have THREE special attackers) go for Butterfree or wait until Contrary's fixed. (Again Ame..)

[Khayoz 0]

Three's a crowd.

[Aizen805 0]

Butterfree. It has tons of coverage and stat enhancing and disabling moves that make up for it's weaknesses.

[Shushup 0]

Butterfree, since Contrary will PROBABLY NOT work, due to a normal Snivy-Serperior not being able to have access to Contrary yet.

[CaptainNikolai 1]

I decided to go with Butterfree, the near-never miss Sleep Powder was too good to pass up. It helped me defeat Noel. So Serperior's on back up, especially now since I used a Heart Scale to teach Gallade Leaf Blade.