I'm leaning towards Speed Boost, but I am kind of unsure of how Colored Glasses work.
Actually giga drain would be alot more useful because swampert is way more OU than gengar and crobati use this as a lead:
megayanma @ focus sash
modest
252 spat. 252 speed 4 hp
tinted lens
ms:
hypnosis
air slash
bug buzz
psychic
u could go with giga drain for swampert but i like psychic for gengar or crobat..
this set worked surprisingly well.. people sometimes dont see a hypnosis or a boosted attack coming
I like it! I just wish he was as cool looking as Scyther... a good option for Wi-Fi would be Giga Drain over HP Ice for Swampert Leads...Yanmega @ Life Orb
Modest Nature
252 Sp. Atk, 204 Spd, 51 HP
Speed Boost
-Protect
-Bug Buzz
-Air Slash
-HP Ice
This Yanmega is the Anti-lead lead, if that makes any sense. Protect once with that exact speed EV to outspeed C.Scarf Hera. Air Slash is OHKO on Hera and Infernape, Buz Buzz is OHKO on Weavile, and HP Ice is OHKO on Garchomp, Salamence, and Dragonite.