i've been more succesful than i expected in showdown with this team, but i think it can be improved, any advice before i start breeding it in-game?
Trevenant @ Sitrus Berry
Ability: Harvest
EVs: 4 HP / 252 Def / 252 SDef
Impish Nature
IVs: 0 Spd
- Shadow Claw
- Trick Room
- Leech Seed/Horn Leech
- Will-O-Wisp

Scrafty @ Big Root
Ability: Shed Skin
EVs: 252 HP / 252 Atk / 4 SDef
Adamant Nature
- Drain Punch
- Crunch
- Bulk Up
- Poison Jab

Reuniclus @ Macho Brace
Ability: Regenerator
EVs: 252 HP / 252 SAtk / 4 SDef
Quiet Nature
IVs: 0 Atk / 0 Spd
- Psyshock
- Trick Room
- Thunder/Energy Ball
- Focus Blast

Steelix @ Life Orb
Ability: Sheer Force
EVs: 252 HP / 252 Atk / 4 SDef
Brave Nature
IVs: 0 Spd
- Iron Head
- Crunch/Fire Fang
- Bulldoze
- Rock Slide

Arcanine @ Air Balloon
Ability: Flash Fire
EVs: 252 Atk / 4 SAtk / 252 Spd
Adamant Nature
- Overheat
- Close Combat
- Crunch/Wild Charge/Outrage/ExtremeSpeed
- Flare Blitz

Vaporeon @ Leftovers
Ability: Water Absorb
EVs: 252 HP / 4 Def / 252 SDef
Calm Nature
IVs: 0 Atk
- Scald
- Heal Bell
- Ice Beam
- Acid Armor/Shadow Ball