Moves
Double-Edge is Spearow's most powerful STAB attack, but it inflicts recoil damage on Spearow after use. Drill Peck is another good STAB attack that provides super effective coverage against Grass- and Fighting-types. U-turn allows Spearow to keep up momentum for its team and switch out of its checks and counters while dealing chip damage. Drill Run is used ito hit Electric-, Rock-, and Steel-types for super effective damage, as the latter two types resist all other STAB. However, all Electric-types other than Magnemite are hit harder by Double-Edge.
Set Details
Sniper is the preferred ability, as Spearow doesn't have a better ability to use; the ability has decent synergy with Drill Run to attempt to land critical hits. Life Orb powers up Spearow's moves, but gives a tiny bit of recoil damage. The IVs in HP lower Spearow's HP to an amount where the Life Orb recoil only takes off one point of HP and also allow Spearow to switch into Stealth Rock for 5 times at most. The investment in Attack lets Spearow hit as hard as possible, while the EVs in both defenses give a tiny boost to Spearow's bad bulk. The investment in Speed is backed up by a Jolly nature, allowing Spearow to Speed tie with Drilbur and Mienfoo.
Usage Tips
Make sure to not recklessly switch in Spearow, as it's extremely frail, and with Stealth Rock up, Spearow will take damage every time it switches in, wearing it down quite easily. U-turn out when you predict that a check or counter to Spearow will switch in, as you can switch to another Pokemon that can proceed to beat that threat; the move also helps to keep momentum for the team. Spearow can, however, be switched in to outspeed and revenge kill a Pokemon, but this should be done carefully, as Spearow is frail.
Team Options
Magnemite is a good teammate in particular, as it covers all of Spearow's weaknesses. In return, Spearow beats the Fighting-types that trouble Magnemite while being immune to Ground. Cleric support from Pokemon such as Spritzee and Snubbull is quite useful, as status cripples Spearow. Rapid Spin or Defog users such as Drilbur or Vullaby make for pretty good teammates too, as they can remove Stealth Rock, which troubles Spearow. Pokemon that can take care of Rock-types reliably, such as Pawniard and Mienfoo, make good teammates too. Pokemon that can set up Stealth Rock, such as Drilbur or Ferroseed, help Spearow get a KO more easily. Knock Off users such as Pawniard and Mienfoo can weaken the foe by removing their item while dealing damage and also help Spearow to pick off foes. Ground-types that beat the Electric-types that trouble Spearow, such as Diglett and Hippopotas, are good teammates as well, especially Diglett, as it traps and beats the Pokemon that trouble Spearow after it U-turns out. Other U-turn or Volt Switch users can form the VoltTurn combination with Spearow and are therefore good partners too, especially slow ones like Chinchou, as they can grant Spearow a safe switch in.