Rate my cousin's team,THX

[Etherion]

Gamblie (Gothitelle) (F) @ Life Orb
Ability: Shadow Tag
Shiny: Yes
EVs: 252 SAtk / 252 HP / 4 SDef
Modest Nature
- Psychic
- Grass Knot
- Hidden Power [Fire]
- Signal Beam

MonkeyBussiness (Infernape) (M) @ Leftovers
Ability: Blaze
Shiny: Yes
EVs: 252 Spd / 252 Atk / 4 SAtk
Hasty Nature
- Fake Out
- Stealth Rock
- Overheat
- Close Combat

Shrek (Froslass) @ Focus Sash
Ability: Cursed Body
Shiny: Yes
EVs: 252 Spd / 252 SAtk / 4 SDef
Timid Nature
- Spikes
- Taunt
- Shadow Ball
- Ice Beam

Gumball (Clefable) @ Life Orb
Ability: Magic Guard
Shiny: Yes
EVs: 252 SDef / 252 HP / 4 Atk
Gentle Nature
- Double-Edge
- Grass Knot
- Fire Blast
- Soft-Boiled

Oil Spill (Dragalge) @ Life Orb
Ability: Adaptability
EVs: 252 Def / 252 HP / 4 SAtk
Bold Nature
- Sludge Bomb
- Dragon Pulse
- Scald
- Protect

thatsYOU (Malamar) @ Assault Vest
Ability: Contrary
Shiny: Yes
EVs: 252 Atk / 252 HP / 4 SDef
Brave Nature
IVs: 0 Spd
- Superpower
- Psycho Cut
- Night Slash
- Trick Room

 

[PlatinumDude]

Just saying, you have to learn what Pokemon is legal and what's not legal currently.

Signal Beam isn't legal on Gothitelle yet because it's a B2/W2 tutor move:
-Psychic/Psyshock
-Thunderbolt
-Hidden Power (Ice/Fire)
-Grass Knot
Nature: Timid/Modest
EVs: 252 SAtk/4 SDef/252 Spe
Item: Choice Specs/Choice Scarf/Life Orb
Ability: Shadow Tag

or
-Psychic/Psyshock
-Thunderbolt/Grass Knot
-Hidden Power (Ice/Fire)
-Thunder Wave
Nature: Modest
EVs: 212 HP/252 Atk/44 Spe
Item: Life Orb/Expert Belt
Ability: Shadow Tag

or
-Calm Mind
-Psyshock
-Hidden Power (Fighting/Fire)/Reflect
-Rest
Nature: Bold
EVs: 252 HP/212 Def/44 Spe
Item: Leftovers
Ability: Shadow Tag

Infernape isn't available till Poke Bank as well. Make do with Chandelure for now:
-Fire Blast
-Shadow Ball
-Energy Ball
-Psychic/Hidden Power (Fighting)/Substitute
Nature: Timid/Modest
EVs: 252 SAtk/4 SDef/252 Spe
Item: Life OrbLeftovers
Ability: Flash Fire

or
-Fire Blast/Overheat
-Shadow Ball
-Energy Ball
-Psychic/Hidden Power (Fighting)
Nature: Timid
EVs: 252 SAtk/4 SDef/252 Spe
Item: Choice Scarf/Choice Specs
Ability: Flash Fire

Greninja and Scolipede make better speedy Spikes stackers because they have more of an offensive presence than Froslass:

Greninja:
-Spikes
-Hydro Pump/Surf
-Ice Beam
-Dark Pulse/Hidden Power (Fire)
Nature: Timid
EVs: 4 Def/252 SAtk/252 Spe
Item: Life Orb/Focus Sash

Scolipede:
-Spikes
-Swords Dance/Toxic Spikes
-Megahorn
-Baton Pass
Nature: Adamant
EVs: 4 HP/252 Atk/252 Spe
Item: Focus Sash
Ability: Speed Boost

Clefable's type was completely replaced by Fairy. There's no point in using Normal moves on it anymore. Also, Sylveon is an easier Fairy to obtain and make use of, due to its better offensive presence and special bulk:
-Wish
-Protect
-Moonblast
-Shadow Ball/Hidden Power (Fire)
Nature: Bold
EVs: 252 HP/252 Def/4 SDef
Item: Leftovers

or
-Calm Mind
-Moonblast
-Shadow Ball
-Hidden Power (Fire)
Nature: Modest
EVs: 252 HP/252 SAtk/4 Spe
Item: Leftovers

Adaptibility isn't EVEN available on Dragalge yet. It was only discovered to have it as its DW ability in the Battle Maison, but it's not available outside of that. Because of this, it must use its regular abilities:
-Toxic Spikes
-Dragon Tail
-Sludge Bomb
-Protect/Hydro Pump/Surf/Thunderbolt/Dragon Pulse
Nature: Sassy
EVs: 252 HP/40 Def/216 SDef
Item: Black Sludge
Ability: Poison Touch

Assault Vest prevents Malamar from using status moves, so Trick Room is out of the question. If you want to use Assault Vest, replace Trick Room with Rock Slide:
-Night Slash
-Psycho Cut/Substitute
-Superpower
-Topsy Turvy/Hypnosis/Light Screen
Nature: Adamant
EVs: 32 HP/252 Atk/224 SDef
Item: Leftovers
Ability: Contrary

or
-Rest
-Sleep Talk
-Night Slash
-Superpower
Nature: Careful
EVs: 252 HP/4 Atk/252 SDef
Item: Leftovers
Ability: Contrary