View all the monotype teams here: https://pastebin.com/S419KvS5

Pokemon Battle Tower Monotype team challenge
FIGHTING team
Version: 1.0
 
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
 
M (Medicham) @ Salac Berry
Ability: Pure Power
Level: 50  
EVs: 4 HP / 252 Atk / 252 Spe
Adamant nature  
IVs: 31 HP / 31 Atk / 31 Def / 31 SpA / 31 SpD / 31 Spe  
- Fake Out
- Shadow Ball
- Endure
- Reversal
 
H (Hitmontop) @ Leftovers
Ability: Intimidate
Level: 50  
EVs: 252 HP / 248 Def / 8 Spe
Careful nature  
IVs: 31 HP / 31 Atk / 30 Def / 31 SpA / 30 SpD / 30 Spe 
- Mach Punch
- Hidden Power [Rock]
- Protect
- Endeavor
 
Notes:
- Flying types: Switch to Hitmontop (Intimidate), tank 2 Drill Pecks or Aerial Aces, Endeavor on the 2nd one, finish with Mach Punch (or Medicham Fake Out if Mach Punch doesn't kill). Then on the next Pokemon, Endeavor if faster and Mach Punch if slower
- Fast Psychic types: Switch to Medicham, tank 1 Psychic, Endure + Shadow Ball
- Fire types: Either OHKO with Heracross or switch to Hitmontop; often Hitmontop can win, but sometimes it must be sacrificed (and then Medicham finishes with Fake Out + Shadow Ball or End/Rev)
- Crobat3 is very scary (Scope Lens + Air Cutter)