Depends on what you want role-wise, and whether you want physical or special if it’s an attacker. So support, sweeper, cleaner, or revenge killer?
support
Support
D. Gren @ Focus Sash/Heat Rock
Ability: Prankster
EVs: 252 HP, 4 Atk/SpA,252 Spe
Timid/Jolly Nature
- Spikes
- Will-O-Wisp/Toxic
- Switcheroo/Sunny Day/Taunt/Swagger
- U-turn/Overheat/Leaf Storm/Sucker Punch/Snarl
LO/Scarf
D. Gren @ Life Orb/Scarf
Ability: Prankster
EVs: 252 SpA, 4 Atk,252 Spe
Timid Nature
- Overheat/Leaf Storm
- Will-O-Wisp/Toxic
- Flamethrower/Fire Blast/Giga Drain/Energy Ball
- U-turn
Specs
D. Gren @ Choice Specs
Ability: Prankster
EVs: 4 Atk, 252 SpA,252 Spe
Timid Nature
- Overheat/Leaf Storm
- Flamethrower/Fire Blast/Giga Drain/Energy Ball
- Focus Blast/Dark Pulse
- U-turn
Band/LO
D. Gren @ Choice Band/LO
Ability: Prankster
EVs: 252 Atk, 4 Def,252 Spe
Jolly Nature
- Sucker Punch/Knock Off
- Leaf Blade
- Blaze Kick/Flame Charge
- U-turn/Swords Dance
thanks
D. Darm @ Choice Scarf/Band
Ability: Wonder Skin
EVs: 252 Atk, 4 Def, 252 Spe
Jolly Nature
- Shadow Sneak
- U-Turn/Sucker Punch/Destiny Bond
- Knock Off
- Superpower/Drain Punch/Sucker Punch
Personally, I would use the Sneak, U-Turn, Knock Off, and Drain Punch, but Sucker Punch and Superpower are good alternates for more power, and Destiny Bond is only for Scarf, but it’s not recommended. You can use it in niche cases, for example, vs Jaern or Xavier, but generally U-Turn or Knock Off or Shadow Sneak will be more useful. Basically only use when it’s almost dead, vs something you can’t win against, or when it’s dead weight, but it has an amazing attack stat and decent speed, and good coverage, so you’ll want it most of the time.