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

Pokemon Battle Tower Monotype team challenge
NORMAL team
Version: 1.0
 
T (Tauros) @ Choice Band
Ability: Intimidate
Level: 50
EVs: 4 HP / 252 Atk / 252 Spe
Adamant nature  
IVs: 31 HP / 31 Atk / 30 Def / 31 SpA / 30 SpD / 31 Spe  
- Return
- Earthquake
- Hidden Power [Ghost]
- Double-Edge
 
L (Linoone) @ Lum Berry
Ability: Pickup
Level: 50  
EVs: 172 HP / 252 Atk / 44 Def / 40 SpD
Adamant nature  
IVs: 31 HP / 31 Atk / 31 Def / 30 SpA / 30 SpD / 31 Spe  
- Extremespeed
- Shadow Ball
- Belly Drum
- Hidden Power [Ground]
 
B (Blissey) @ Leftovers
Ability: Natural Cure
Level: 50
EVs: 44 HP / 252 Def / 164 SpA / 4 SpD / 44 Spe
Bold nature  
IVs: 31 HP / 0 Atk / 31 Def / 31 SpA / 31 SpD / 31 Spe 
- Thunderbolt
- Ice Beam
- Calm Mind
- Softboiled
 
Notes:
- Tauros is one of the best all-around Pokemon for the Tower, since it outspeeds and survives a hit from nearly every Pokemon (including Cross Chop Machamp) while doing massive damage. It sweeps many teams by itself.
- Blissey sets up on any special attacker effortlessly and then sweeps with BoltBeam.
- Linoone is mostly used to revenge kill the 2nd or 3rd Pokemon after Tauros weakens it, but it can set up Belly Drum on many Pokemon as well thanks to its Lum Berry and defensive EV spread. After setting up Belly Drum, it OHKOs the majority of Pokemon with Extremespeed.
- Machamp is still a big threat since there are 8 variants, some of them run Counter, many have enough defense to survive Double-Edge and then kill with Cross Chop, and Cross Chop has a high crit chance. You can revenge kill them with Blissey or Linoone, but you often lose from here to trainers that specialize in Fighting Pokemon.
- Tauros leads rounds 1 and 5-10; Linoone leads rounds 2-4 to speed things up.