Scolipede
- Incredibly fast
- Decent Attack of 90
- Venipede can be found very early
- Whirlipede evolves somewhat quickly
- Learns moves like Megahorn, Poison Tail, Toxic, and Strength
- Frail
- Poor movepool and no good Bug STAB without a Heart Scale
- Bug/Poison is weak to four types and is a redundant offensive type
Escavalier
- Phenomenal base Attack of 135, one of the highest in the game
- Solid defensive stats of 70/105/105
- Karrablast can be found just before the fifth Gym
- Just one weakness
- Learns moves like X-Scissor, Swords Dance, False Swipe, Iron Head, and Headbutt
- You must trade with another player's Shelmet to evolve Karrablast
- Very slow
- 4x weakness to Fire
If you have the tools to get Escavalier, then it's better both offensively and defensively. Scolipede is better if you want a faster Pokemon, but it's a bit weaker and slightly inconvenient to get STAB for. I'll give a set for each:
Escavalier @ Muscle Band / SilverPowder
Ability: Swarm
- Iron Head
- X-Scissor
- Slash / Headbutt
- False Swipe / Swords Dance / Reversal
Scolipede @ SilverPowder / Poison Barb
Ability: Swarm
- Megahorn
- Poison Tail
- Toxic
- Strength / Double-Edge