Rate my team please

[EiscueDeath]

Rillaboom @ Assault Vest
Ability: Grassy Surge
EVs: 252 Atk / 36 Def / 80 SpD / 140 Spe
Naughty Nature
- Fake Out
- Knock Off
- Grassy Glide
- U-turn
Fake out is for chip damage and flinch. Grassy gilde and grassy surge make grassy gilde a strong move with priority. Uturn is for pivot while knock off is for crippling walls and coverage

Serperior @ Leftovers
Ability: Contrary
EVs: 4 HP / 252 SpA / 252 Spe
IVs: 0 Atk
- Leaf Storm
- Dragon Pulse
- Hidden Power [Ghost]
- Substitute
Seperior sets up substitue and then starts sweeping. Leaf storm raises spa. by 2 because of contrary and the rest are coverage.

Ditto @ Choice Scarf
Ability: Imposter
EVs: 252 HP / 252 Atk
IVs: 30 Atk
- Transform
Ditto is to reverse sweep with transform and to counter mons like excadrill . Also choice scarf is to outspeed mons after transform

Greninja-Ash (M) @ Expert Belt
Ability: Battle Bond
EVs: 252 SpA / 252 Spe
- Dark Pulse
- Water Shuriken
- Acrobatics
- Gunk Shot
Greninja is here to sweep after it pivots in from uturn or volt switch and takes a kill. Dark pulse and water shuriken are main stab moves while acrobatics and gunk shot for coverage.

Corviknight @ Leftovers
Ability: Pressure
EVs: 252 HP / 252 Def
- U-turn
- Substitute
- Roost
- Defog
Corvikinght is basically a stall mon.
Uturn is used for pivoting into sweepers substitue and roost are fot stalling out turns. Defog is to clear hazards

Toxtricity-Low-Key @ Black Sludge
Ability: Punk Rock
EVs: 252 SpA / 252 Spe
IVs: 0 Atk
- Boomburst
- Overdrive
- Sludge Bomb
- Volt Switch
Another sweeper. Boomburst is basically a strong move that also hits behund substitute. Overdrive and sludge bomb are stab moves while volt swotch for pivot.

 

[TGA]

Hi i suppose this is a nat dex ou team.

Rillaboom @ Choice Band
Ability: Grassy Surge
EVs: 252 Atk / 4 Def / 252 Spe
Adamant Nature
- Wood Hammer
- Grassy Glide
- U-turn
- Knock Off
I dont see why will you have av on rili. Grassy glide for priorty woodhammer hits glsicor hard on switchin. U turn for pivoting and knock off allows it to cripple tangwroth.

Serperior @ Leftovers
Ability: Contrary
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Leaf Storm
- Glare
- Hidden Power [Fire]
- Substitute
Double grass is interasting. I dont know how hp ghost is useful. Hp fire hits ferrothorn and mega scizor. And glare to cripple heatran.

Ditto @ Choice Scarf
Ability: Imposter
EVs: 248 HP / 252 Def / 8 SpD
Relaxed Nature
- Transform
I dont think ditto is that good but ig you can use it to revenge kill mega garchomp, mega zard x.

Greninja @ Choice Specs
Ability: Battle Bond
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
- Hydro Pump
- Dark Pulse
- Water Shuriken
- Spikes
Specs gren is the best ash gren set it hits that hard. Hydro pump and dark pulse for stab. Water shuriken for priorty. And spikes to help its teammates.

Corviknight @ Leftovers
Ability: Pressure
EVs: 252 HP / 184 Def / 72 SpD
Impish Nature
- Defog
- Brave Bird / Body press
- U-turn
- Roost
Sub corvi is eh at best. Reather you should use brave bird to grass types or body press for magnezone or heatran.

Toxi is bad. If you wanna use a electric type use tapu koko, magnezone or zapdos.

Other ig lol-
1.team is preety weak to gren i think you should use tangrowth or tapu fini instead of riliboom or serperior.
2.team is also weak to heatran, z thunder lele, mega zard y, fire type in general.

I would say if you wanna make a team you should look at Via ranking, nat dex anlaysis.

There is also nat dex Forums that has cool stuff by preety cool people :o. You could check those.

Hope i helped lol.