Forretress @ Leftovers
Ability: Sturdy
EVs: 252 HP / 4 Atk / 252 Def
Relaxed Nature
- Counter
- Gyro Ball
- Rapid Spin
- Stealth Rock / Spikes / Toxic Spikes
Counter Forretress might surprise physical sweepers/breakers that think they can set up on Forretress as long as they can tank Gyro Ball. Sturdy ensures you'll have a chance to use the attack. The set sacrifices Volt Switch, so your team will need other ways to control momentum.
Apart from Counter, this is a fairly typical utility Forretress with Rapid Spin, Stealth Rock, and Gyro Ball (which rounds out Forretress's offensive presence). Wish users are especially good teammates, as are Pokemon that tend to invite slow physical wallbreakers into play, so you can use the Forretress lure. This Counter set is also a decent lead, though you'll probably want the Custap Berry + Explosion set if you're running Forretress on HO.