The format is Gen 7 OU
Chandelure - Timid
EVs : 255 Spe 255 SpA 4 HP
Item : Leftovers
Ability : Flash Fire
Moveset :
-Substitute
-Will O Wisp
-Flamethrower
-Hex
Porygon2 - Bold
EVs : 255 HP 255 Def 4 SpD
Item : Eviolite
Ability : Trace
Moveset :
-Recover
-Thunder Wave
-Ice Beam
-Thunderbolt
Skarmory - Jolly
EVs : 255 Atk 255 Spe 4 HP
Item : Life Orb (any suggestions?)
Ability : Weak Armor
Moveset :
-Stealth Rock
-Swords Dance
-Iron Head
-Brave Bird
Garchomp - Jolly
EVs : 255 Atk 255 Spe 4 HP
Item : Choice Band
Ability : Rough Skin
Moveset :
-Earthquake
-Poison Jab
-Outrage
-Aqua Tail
Cloyster - Adamant
EVs : 255 Atk 255 Spe 4 HP
Item : Focus Sash
Ability : Skill Link
Moveset :
-Shell Smash
-Icicle Spear
-Rock Blast
-Liquidation
Serperior - Timid
EVs : 255 Spe 255 SpA 4 HP
Item : Leftovers
Ability : Contrary
Moveset :
-Leaf Storm
-Dragon Pulse
-Leech Seed
-Attract
Ok so guys, my team obviously sucks so lemme know who should I replace, what moves should I give them instead, or what items are good for them. Any reply is very much appreciated :)