View all the monotype teams here: https://pastebin.com/S419KvS5
 
Pokemon Battle Tower Monotype team challenge
BUG team
Version: 3.0
 
H (Heracross) @ Lum Berry
Ability: Swarm
Level: 50  
EVs: 4 HP / 252 Atk / 252 Spe
Jolly nature  
IVs: 31 HP / 31 Atk / 31 Def / 31 SpA / 31 SpD / 31 Spe  
- Megahorn
- Brick Break
- Swords Dance
- Earthquake
 
S (Scizor) @ Salac Berry
Ability: Swarm
Level: 50  
EVs: 4 HP / 252 Atk / 4 Def / 248 Spe
Adamant nature  
IVs: 31 HP / 31 Atk / 31 Def / 31 SpA / 30 SpD / 30 Spe  
- Hidden Power [Bug]
- Reversal
- Swords Dance
- Endure
 
A (Armaldo) @ Leftovers
Ability: Battle Armor
Level: 50  
EVs: 252 HP / 248 SpD / 8 Spe
Careful nature  
IVs: 31 HP / 31 Atk / 30 Def / 31 SpA / 30 SpD / 30 Spe 
- Hidden Power [Rock]
- Earthquake
- Swords Dance
- Protect
 
Notes:
- Heracross dominates everything except the Pokemon that hit it super effectively (see notes below). Armaldo is a reliable answer to many of Heracross' counters thanks to its Battle Armor ability and bulk.
- Flying types: Switch to Armaldo + Protect + HP Rock (Protect + Swords Dance first if it's a 2HKO)
- Fast Psychic types: Switch to Scizor + HP Bug (Endure first if the next hit can kill)
- Fire types: Either OHKO with Heracross or switch to Armaldo + HP Rock; Scizor can also beat many of them with Endure + Reversal
- Gengar: Damage as much as you can with Heracross, then finish with Armaldo
- Skarmory: Try to beat with Scizor's Reversal (sometimes doesn't work because of Scope Lens and Agility)