SM OU Rate my team please!!

[SoggySaltine]

Hello! I'm new to OU (three days!) coming from monotype. here's my first team. i would love if you could help me out! thank you so much!

Scizor-Mega @ Scizorite
Ability: Technician
EVs: 248 HP / 16 Def / 244 SpD
Impish Nature
- Bullet Punch
- Knock Off
- Swords Dance
- Roost

Heatran @ Leftovers
Ability: Flash Fire
EVs: 224 HP / 32 SpA / 252 Spe
Timid Nature
IVs: 0 Atk
- Magma Storm
- Earth Power
- Stealth Rock
- Taunt

Toxapex @ Black Sludge
Ability: Regenerator
EVs: 252 HP / 4 Def / 252 SpD
Calm Nature
IVs: 0 Atk
- Toxic Spikes
- Baneful Bunker
- Recover
- Scald

Tapu Bulu @ Grassium Z
Ability: Grassy Surge
EVs: 252 HP / 252 Atk / 4 Spe
Adamant Nature
- Zen Headbutt
- Horn Leech
- Superpower
- Synthesis

Landorus-Therian @ Choice Scarf
Ability: Intimidate
EVs: 232 Atk / 68 Def / 208 Spe
Jolly Nature
- U-turn
- Earthquake
- Defog
- Stone Edge

Greninja @ Expert Belt
Ability: Protean
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Hydro Pump
- Dark Pulse
- Ice Beam
- Hidden Power [Electric]

 

[TPP]

Welcome to Smogon! I'm locking your RMT for the time being as the forum rules require that you provide at least 3 lines of descriptions for each Pokemon to explain their roles. Please read the rules carefully and take a look at Team Showcase to see the level of detail we require. PM me with updated descriptions and I'll be happy to unlock this. If you need help with the explanations, you can use the smogon dex for help.