This is my usual team for monotype battles on showdown. It's the best team I've mad for monotype so far but it suffers a lot due to the multitude of weaknesses.
Venusaur(M) @ Venusaurite
Ability: Overgrow
EVS: 248 HP, 252 SAtk, 8 Spd
Rash Nature (+SAtk, -SDef)
-Giga Drain
-Sludge Bomb
-Synthesis
-Knock Off
Venusaur is my obligatory Mega. It is a Bulky Tank as it survives multiple hits and heals itself while dealing damage. Giga Drain is STAB and used to heal Venusaur while dealing damage. Sludge Bomb is another STAB while giving me a 30% chance of poisoning which would allow me to deal even more damage. Synthesis is used for a more reliable heal. Knock Off deals with items and psychic types which could potentially destroy my team
Nidoqueen(F) @ Black Sludge
Ability: Poison Point
EVS: 252 HP, 4 Atk, 252 Def
Impish Nature (+Def, -SAtk)
-Stealth Rock
-Toxic Spikes
-Dragon Tail
-Earthquake
Nidoqueen is my hazard setter/phazer. Stealth Rock and Toxic Spikes are my entry hazards. Dragon Tail is used to deal damage while switching out the foe to stop setting up. Earthquake is used for the main bulk of damage on Nidoqueen
Tentacruel(M) @ Black Sludge
Ability: Clear Body
EVS: 252 SAtk, 4 SDef, 252 Spd
IVS: 0 Atk
Timid Nature (+Spd, -Atk)
-Rapid Spin
-Ice Beam
-Scald
-Sludge Bomb
Tentacruel is my rapid spinner. Clear Body is to avoid stat drops especially speed. Rapid Spin is a must for Tentacruel. Ice beam is coverage. Scald is STAB with a good chance of burn. Sludge Bomb is the other STAB move with a good chance of poison.
Drapion(M) @ Lum Berry
Ability: Sniper
EVS: 248 HP, 252 SAtk, 8 Spd
Adamant Nature (+Atk, -SAtk)
-Knock Off
-Cross Poison
-Swords Dance
-Earthquake
Drapion is my physical sweeper. Sniper is used for my critical hits so I deal even more damage. Lum Berry is used to get of status especially burn which would weaken Drapion. Knock Off is STAB and used to deal with items, Cross Poison is the other STAB which I can utilize with Sniper to deal high amounts of damage often. Swords Dance is used to set up and Earthquake is coverage.
Gengar(M) @ Life Orb
Ability: Levitate
EVS: 252 SAtk, 4 SDef, 252 Spd
IVS: 0 Atk
Timid Nature (+SAtk, -SDef)
-Shadow Ball
-Sludge Bomb
-Focus Blast
-Taunt
Gengar is my Special Sweeper. Shadow Ball is STAB with a added bonus of sometimes lowering Sp.Def. Sludge Bomb is STAB and poisoning. Focus Blast is coverage and powerful even if its accuracy is not so good. Taunt is used to deal with pokemon that generally use status moves
Crobat(M) @ Black Sludge
Ability: Infiltrator
EVS: 252 HP, 4 Atk, 252 Spd
Jolly Nature (+Spd, -SAtk)
-Brave Bird
-Whirlwind
-Taunt
-Roost
Crobat is a support pokemon. Brave Bird is the main damage output. Whirlwind is also used for phazing and with Nidoqueen's hazards, can help cause damage to the opponent. Taunt is used to deal with status moves. Roost is my healing move
