Rate my National Dex team!

Question

Cinderace @ Heavy-Duty Boots
Ability: Libero
Shiny: Yes
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Pyro Ball
- Gunk Shot
- U-turn
- Sucker Punch

Gardevoir-Mega @ Gardevoirite
Ability: Synchronize
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Mystical Fire
- Moonblast
- Shadow Ball
- Thunderbolt

Greninja-Ash (M) @ Focus Sash
Ability: Battle Bond
EVs: 4 Atk / 252 SpA / 252 Spe
Hasty Nature
- Extrasensory
- Water Shuriken
- Ice Beam
- Acrobatics

Kartana @ Occa Berry
Ability: Beast Boost
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Smart Strike
- Sacred Sword
- Leaf Blade
- Swords Dance

Serperior @ Life Orb
Ability: Contrary
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Leaf Storm
- Synthesis
- Dragon Pulse
- Glare

Celesteela @ Assault Vest
Ability: Beast Boost
EVs: 252 HP / 252 SpA / 4 SpD
Modest Nature
IVs: 0 Atk
- Air Slash
- Flash Cannon
- Flamethrower
- Energy Ball

Comments

Hmm maybe sash on Kartana and leech seed instead of energy ball for Celesteela. Also Gardevoir might want some psychic STAB moves.

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Surf or Hydro Pump over Acrobatics on Ash-Gren, and Specs or Life Orb. Also 4 sp. def with timid nature.