I decided to make a somewhat UU team that centered around my Mega. Hope you enjoy it:
Mrs. O'Leary (Mega Houndoom) @Houndoominite
Nature: Hasty
EVs: 252 Sp.Atk / 252 Spe / 4 Atk
Ability: Flash Fire --> Solar Power
Moves:
Sucker Punch
Nasty Plot
Dark Pulse
Fire Blast
Fluballs (Weezing) @Black Sludge
Nature: Bold
EVs: 252 HP / 252 Def / 4 Sp.Atk
Ability: Levitate
Moves:
Will-O-Wisp
Sludge Bomb
Flamethrower
Pain Split
Berserker (Haxorus) @Choice Scarf
Nature: Adamant
EVs: 252 Atk / 252 Spe / 4 HP
Ability: Mold Breaker
Moves:
Earthquake
Rock Slide
Poison Jab
Outrage (it's still viable, you just spam it carefully)
Schreck (Swampert) @Leftovers
Nature: Adamant
EVs: 252 HP / 252 Sp.Def / 4 Atk
Ability: Torrent
Moves:
Toxic
Roar
Earthquake
Waterfall
Softchew (Slurpuff) @Sitrus Berry
Nature: Adamant
EVs: 252 Atk / 252 Spe / 4 HP
Ability: Unburden
Moves:
Belly Drum
Return
Play Rough
Protect (If nothing, the last move might prove helpful to scout :P)
Tuffnut (Forretress) @Rocky Helmet
Nature: Bold
EVs: 252 HP / 252 Sp.Def / 4 Def
Ability: Sturdy
Moves:
Spikes
Stealth Rock
Rapid Spin
Volt Switch
Quite a bit of this team is from the UU tier, and I wanted Stealth Rock on Swampert which I could not get, so I put Toxic instead.
It is a mainly defensive team, as there are no weaknesses that are shared among these pokemon, unless Mold Breaker is on the opponent's side.
Feel free to suggest/advice/replace any of these pokemon as usual pls.