My Competitive Team

Haxorus (Ononokusu) [Dragon]
Nature: Adament
Moveset: Dragon Claw, Earthquake, Outrage, Brick Break
Item: Choice Scarf
Ability: Mold Breaker
EVS: 4 HP/252 ATK/ 252 SPD


Volcarona [Bug/Fire]
Nature: Timid
Moveset: Butterfly Dance, Bug Buzz, Fire Blast, Will-o-wisp
Item: Life Orb
EVS: 4 HP/ 252 SPA/252 SPD


Samurott [Water]
Natture: Timid
Moveset: Hydro Pump, Ice Beam, Grass Knot, Surf
Item: Swimming Googles
EVS: 4 HP/252 SPA/252 SPD


Conkeldurr [Fighting]
Nature: Adamant
Moveset: Mach Punch, Drain Punch, Earthquake, Detect
Item: Flame Orb
Ability: Guts
EVS: 252 HP/ 252 ATK / 4 SPD


Forrothorn [ Grass/Steel]
Nature: Sassy
Movesets: Spikes, Power Whip, Gyro Ball, Protect
Item: leftovers
EVS: 252 HP/ 4 ATK/ 252 SPD


As You can see, I am missing a member of my team. Any suggestions? I was thinking of removing Samurott for a better water type? Any thoughts?

PS: SPD stands for speed.

Kay so Samurott really shouldn't be in a OU competetive team just because it is completely outclassed by Cloyster.
name: Shell Smash
move 1: Shell Smash
move 2: Icicle Spear
move 3: Rock Blast
move 4: Razor Shell / Hydro Pump
item: Life Orb / White Herb
ability: Skill Link
nature: Jolly / Naive
evs: 48 HP / 252 Atk / 208 Spe
Shell Smash is an amazing move to sweep with and it would really improve your team.
On ferrothorn replace protect with Leech seed sinc eprotect won't do you any good.

I also notice your team is Thundurus Weak:
Nasty Plot Variants will destory 4/6 of your team so you should watch out! I really do not know how to fix this issue though.

you have volcarana with no taunt/rapid spin...
also volcarana doesn't need will-o-wisp, you want to be killing everything with it being a sweeper
ferrothorn seems a bit..pointless too, this being a more offensive team. Spikes should really be replaced with stealth rock, better on offensive teams for quicker set-up with often more damage