Yanmega @ Life Orb
Ability: Speed Boost
EVs: 252 SpA / 4 SpD / 252 Spe
Modest/ Timid Nature
- Bug Buzz
- Air Slash
- Giga Drain/ Hidden Power Fire
- Detect
Excadrill @ Choice Scarf
Ability: Mold Breaker
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Earthquake
- Iron Head
- Rock Slide
- Rapid Spin
Yanmega is a great late-game sweeper once its checks and counters are gone. Bug buzz is the primary STAB, hitting the lati twins, starmie, and is yanmega's most spammable move. Air slash allows it to hit Venusaur, Amoonguss, and Keldeo, allowing it to effectively check them. Giga drain is a decent coverage move for Rotom-W and could be used to restore a little HP, and hidden power fire targets ferrothorn, skarmory, and scizor, effectively luring and OHKOing them. Finally Detect is used to get a free speed boost and to not be normal. Max Speed and Special Attack is standard to hit as hard as possible, while modest nature is used because speed boost.
However, Yanmega is walled by a few common threats, namely Heatran and the zards. Also, many priority users easily prey on Yanmega's bad defensive typing. Scarf Excadrill is an almost perfect partner for Yanmega, able to check Heatran, Thundurus, both Zards, tyranitar, and countering Klefki. it also provides rapid spin support for Yanmega. The moveset is standard so i wont explain it. Choice scarf allows excadrill to outspeed heatran, rotom, and the zards, and lets it beat talonflame without flare blitz.
Yanmega is also a great partner for excadrill, being able to switch into Mach punch from breloom,lando, Serperior, and is able to check slowbro. It's also able to 2hko Lando and skarmory with Air Slash and HP Fire respectively.