Moves
Wild Charge is Blitzle's best STAB move and has nice Base Power; its only downside is that it whittles Blitzle down very quickly due to both its recoil and Life Orb's. Volt Switch is a STAB move that helps keep up offensive momentum. Flame Charge is a coverage move, albeit a weak one, that boosts Blitzle's Speed by one stage. However, Flame Charge typically does abysmal damage to Eviolite-holders, so its primary purpose is to weaken or finish off Pokemon that are not holding an Eviolite. The final moveslot is dedicated to a Normal-type move, with each serving a very different purpose from the other. Double-Edge is a hard-hitting move that can be very taxing on Blitzle due to its recoil, whereas Quick Attack is a moderately weak priority attack that is used primarily to finish off weakened foes. Both of these moves are situational and easily interchangeable, as they will typically not be favored over another move.
Set Details
196 EVs maximize Blitzle's Attack, increasing its potency as a physical attacker. 228 Speed EVs and a Naive nature put Blitzle at 18 Speed, the maximum it can reach, without hindering either offensive stat. The remaining EVs are split between Blitzle's defenses and Special Attack, increasing each by one point. 0 HP IVs minimize the recoil Blitzle takes from Life Orb, increasing Blitzle's longevity. Life Orb boosts the power of all of Blitzle's attacks without locking it into a move. Sap Sipper is the ability of choice, as it makes Blitzle immune to Grass, an otherwise neutral type, while boosting Blitzle's Attack if it is hit by a Grass-type move.
Usage Tips
Be certain to use Blitzle conservatively, as it is easily whittled down. It should not be sent in against any strong Pokemon as it will be hit hard due to its subpar defenses. The best times to directly switch Blitzle in are when Blitzle has a safe switch from a teammate's pivoting move such as U-turn or Volt Switch, or when the opposing Pokemon is guaranteed to use a Grass-type move so that Blitzle can gain the boost.
Team Options
Blitzle's main niche is as a Sticky Webs abuser that checks Snivy, an otherwise enormous threat to Sticky Webs teams; unlike most Snivy checks, Blitzle is unlikely to detract from the team's momentum due to its offensive nature. For this reason, Spinarak and Surskit are excellent teammates. As Blitzle has no method of increasing its damage output outside of Life Orb, it is best to have an entry hazards user. Dwebble and Ferroseed both work for this role, as they are competent Pokemon capable of laying down Spikes or Stealth Rock. Flying-types are great partners for Blitzle, as they can avoid Ground-type attacks that could devastate Blitzle, as well as deal with bulky Grass-types that do not take much from Flame Charge, such as Foongus and Pumpkaboo. In return, Blitzle can easily eat up or avoid any form of Electric-type attack directed at Flying-types. Fletchling is a powerful Flying-type physical attacker that greatly appreciates having Blitzle to eat up Electric-type attacks. As Blitzle is walled by most Ground-type Pokemon and Chinchou, having a Grass-type that can dispose of them, such as Pumpkaboo or Foongus, is much appreciated by Blitzle. Finally, having a potent Knock Off user that can aid in wearing down opposing walls is greatly beneficial to Blitzle, which often cannot heavily damage Eviolite users. Corphish both appreciates and assists Blitzle, taking advantage of Blitzle's immunity while still fulfilling the role of Knocking Off foes' items.