I've been running a banded physical set on Tapu Koko with a jolly nature, something I haven't seen a lot which is surprising to me because it does nasty damage
Brave Bird
Wild Charge
U-Turn
Steel Wing
I added Steel Wing mainly for an option that does not involve recoil
Against offensive Lele:
252 Atk Choice Band Tapu Koko U-turn vs. 4 HP / 0 Def Tapu Lele: 70-83 (47.9 - 56.8%) -- 89.5% chance to 2HKO
252 Atk Choice Band Tapu Koko Steel Wing vs. 4 HP / 0 Def Tapu Lele: 140-166 (95.8 - 113.6%) -- 81.3% chance to OHKO
Against Bulu:
252 Atk Choice Band Tapu Koko Brave Bird vs. 252 HP / 4 Def Tapu Bulu: 168-198 (94.9 - 111.8%) -- 68.8% chance to OHKO
Against Calm Mind tapu fini:
252 Atk Choice Band Tapu Koko Wild Charge vs. 252 HP / 100 Def Tapu Fini: 170-204 (96 - 115.2%) -- 75% chance to OHKO
Against Nihilego although it could run scarf:
252 Atk Choice Band Tapu Koko Steel Wing vs. 4 HP / 0 Def Nihilego: 196-232 (105.9 - 125.4%) -- guaranteed OHKO
Against Minior:
252 Atk Choice Band Tapu Koko Steel Wing vs. 252 HP / 252- Def Minior-Up: 98-116 (58.6 - 69.4%) -- guaranteed 2HKO
Brave Bird
Wild Charge
U-Turn
Steel Wing
I added Steel Wing mainly for an option that does not involve recoil
Against offensive Lele:
252 Atk Choice Band Tapu Koko U-turn vs. 4 HP / 0 Def Tapu Lele: 70-83 (47.9 - 56.8%) -- 89.5% chance to 2HKO
252 Atk Choice Band Tapu Koko Steel Wing vs. 4 HP / 0 Def Tapu Lele: 140-166 (95.8 - 113.6%) -- 81.3% chance to OHKO
Against Bulu:
252 Atk Choice Band Tapu Koko Brave Bird vs. 252 HP / 4 Def Tapu Bulu: 168-198 (94.9 - 111.8%) -- 68.8% chance to OHKO
Against Calm Mind tapu fini:
252 Atk Choice Band Tapu Koko Wild Charge vs. 252 HP / 100 Def Tapu Fini: 170-204 (96 - 115.2%) -- 75% chance to OHKO
Against Nihilego although it could run scarf:
252 Atk Choice Band Tapu Koko Steel Wing vs. 4 HP / 0 Def Nihilego: 196-232 (105.9 - 125.4%) -- guaranteed OHKO
Against Minior:
252 Atk Choice Band Tapu Koko Steel Wing vs. 252 HP / 252- Def Minior-Up: 98-116 (58.6 - 69.4%) -- guaranteed 2HKO