This is my first competitive team, there is no real theme I just went with what helped me get wins on pokemon showdown, any advice will be appreciated.
Toxicroak @ focus sash
Ability: Poison touch
EVs: 252 Attack, 252 Speed and 4 HP
Nature: Jolly
-Cross Chop
-Sword Dance
-Ice Punch
-Sucker Punch
Toxicroak serves as my lead, starting off with a sword dance to power him up and using the Focus Sash to survive the first hit and then attacking with his powered up attacks, Cross Chop for a powerful STAB move, Ice Punch for dragons and Sucker Punch for anything faster than him and anything weak to dark.
Garchomp @ Choice Band
Ability: Rough skin
EVs: 252 Attack, 252 Speed and 4 HP
Nature: Jolly
-Outrage
-Earthquake
-Fire Fang
-Dual Chop
Garchomp is my revenge killer, he is sent in after one of my pokemon is defeated to finish off the opponents, he can also take out other dragons and outspeeds most quite well.
Outrage is brilliant for him as it is 120 base damage, plus STAB, plus the bonus that the Choice Band gives, Dual Chop is also effective against opponents using substitute as it is another STAB move and can break through and damage the opponent.
Vaporeon @ Leftovers
Ability: Water Absorb
EVs: 252 HP, 252 Defense and 4 speed
Nature: Bold
-Wish
-Protect
-Scald
-Icebeam
Vaporeon is used to scout out the opponents moveset, defeat dragons and get powerful STAB, super effective attacks off on opponents pokemon that are weak to water or ice, another upside to Vaporeon is the support it can give with Wish, due to it's large health pool.
Finally Vaporeon can be switched in to battle opponents water type pokemon and often gain health in the process.
Reuniclus @ Leftovers
Ability: Overcoat
EVs: 252 HP, 252 Defense and 4 Special Attack
Nature: Bold
-Calm Mind
-Psyshock
-Focus Blast
-Recover
Reuniclus is my special sweeper/tank of sorts, the overcoat ability rids me of any weather problems that may be affecting my enemy, leaving the leftovers to gain a continuous stream of health rather than having to be constantly making up for the damage that weather provides.
Psyshock is a powerful STAB move that adds the option of hitting at an opponents Defense stat or their Special Defense stat whilst maintaining the benefits that come with specialising in one type of attack.
Hippowdon @ Leftovers
Ability: Sand Stream
EVs: 252 HP, 252 Defense and 4 attack
Nature: Impish
-Stone Edge
-Slack Off
-Ice Fang
-Stealth Rock
Hippowdon is my physical wall, but he can also be turned offensive when he needs to, with Ice Fang hitting dragons hard and Stealth rock laying down some entry hazards he can really inflict some damage whilst soaking some of the opponents attacks, Slack Off means that he can carry on going for a long period of time and soak up more damage
Blissey @ Leftovers
Ability: Natural Cure
EVs: 200 HP, 252 Defense and 56 Special Attack
Nature: Bold
-Wish
-Grass Knot
-Seismic Toss
-Flamethrower
Blissey is my Special Wall/Tank, it's huge health pool and base Special Defense stat coupled with her surprisingly aggressive moveset make her troubling for my opponent, wish on Blissey is crazy, it's max HP is 702, meaning that any pokemon receiving this wish is most likely going to be at 100% health.
Flamethrower and Grass Knot have been thrown in to add an aggressive side to Blissey and often end up KOing my opponents pokemon.