(OU/UUBL)
idk insert name here: Grass/Fighting
77/91/73/89/109/101 (BST: 540)
Ability 1: Bulletproof
Ability 2: Technician
Ability 3: Shrapnel Shot (clone of Parental Bond)

Viable moves: Bullet Seed, Seed Bomb, Power-Up-Punch, Mach Punch, Drain Punch, Rock Blast, Rock Slide, Bulk Up, Bullet Punch, Taunt

Main Premise: Revenge Killer, Wallbreaker, Stallbreaker

benefits: outspeeds base 100, Power-Up-Punch with Parental Bond hurts like hell, interesting revenge killer
downsides: bad defensive typing, low physical bulk means it's hard to switch in, weak when not boosted, its good moves have low base power or are otherwise unpredictable (i.e bullet seed)

sample sets:
idk insert name here @ Life Orb / Choice Band / Choice Scarf
Ability: Technician
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Bulk Up / Power-up-Punch
- Bullet Seed
- Mach Punch
- Taunt / Bullet Punch / Rock Blast

idk insert name here @ Grassium Z / Rockium Z
Ability: Parental Bond
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Power-up-Punch
- Seed Bomb
- Mach Punch / Drain Punch
- Bullet Punch / Rock Slide / Taunt

Checks: Alomomola, Bisharp, Chansey, Excadrill, Ferrothorn, Greninja-Ash, Gyarados-Mega, Hoopa-Unbound, Kyurem-Black, Mamoswine, Terrakion, Tyranitar
Offensively checked by: Alakazam-Mega, Blacephalon, Diancie-Mega, Dragonite, Gengar, Gyarados, Magearna, Pinsir-Mega, Salamence, Tapu Koko, Tapu Lele, Tornadus-Therian
Defensively checked by: Buzzwole, Clefable, Tangrowth, Toxapex, Zapdos
Counters: Amoonguss, Landorus-Therian, Lati@s(-Mega), Venusaur-Mega