[DISCUSSION] Can This Group Be Competitive?

[Marcusube]

Is this for Battle Spot singles, doubles, triples, VGC, what?

Team dynamics differ in each format so this isn't a question that can be given an upfront answer. From what I see, this can work in BS Singles though.

Kangaskhan-Mega (F) @ Kangaskhanite
Ability: Scrappy
Level: 50
EVs: 4 HP / 252 Atk / 252 Spe
Jolly Nature
- Power-Up Punch
- Fake Out
- Sucker Punch
- Return

Greninja @ Focus Sash
Ability: Protean
EVs: 4 HP / 252 SpA / 252 Spe
Timid Nature
- Ice Beam
- Dark Pulse
- Grass Knot
- Gunk Shot

Umbreon @ Leftovers
Ability: Synchronize
Level: 50
EVs: 252 HP / 4 Def / 252 SpD
Calm Nature
- Wish
- Protect
- Heal Bell
- Foul Play

Crobat @ Black Sludge
Ability: Infiltrator
Level: 50
EVs: 244 HP / 52 Def / 212 Spe
Jolly Nature
- Brave Bird
- U-turn
- Taunt
- Roost

Marowak @ Thick Club
Ability: Rock Head
Level: 50
EVs: 252 Atk / 4 Def / 252 Spe
Adamant Nature
- Bonemerang
- Knock Off
- Double-Edge
- Substitute

Politoed @ Leftovers
Ability: Water Absorb
Level: 50
EVs: 252 HP / 4 Def / 252 SpA
Modest Nature
IVs: 0 Atk
- Scald
- Ice Beam
- Perish Song
- Hypnosis