Forget Honchrow, Murkrow is where it’s at! As one of the few Prankster Pokémon who is also a Dark type, it can’t be Taunted by other Prankster Pokémon like Whimsicott. And with the introduction of Gen2 virtual console, a terrifying set becomes available.
Harbinger
EV: Max HP, mixed defenses.
Nature: -Speed, +what you need.
Prankster
Eviolite
Curse
Calm Mind
Roost/Rest
Mirror Move/Payback/attack
I ran this in an all-Status team, and it was dangerous in the Legendary Battle Spot Doubles, only losing once in over 20 battles. After one Shuckle Guard Split, it gets a little more tanky than Snorlax. Curse and Calm Mind increase your defenses further, while your offenses go up and your unimportant Speed (Prankster!) drops. Roost or Rest is for recovery.
Mirror Move is a priority (Prankster!) attack that returns what your opponent used back at them, and both Curse and Calm Mind will boost their damage. But Dark types are guaranteed to be immune, and the opponent may wise up and only use attack’s they are immune to, such as (random example) a Gastrodon with Scald and Storm Drain.
If you fear any non-Prankster Pokémon using Taunt, or opposing Dark types, Payback is another option. With the low speed, it’s guaranteed to move second for doubled damage on top of STAB.
Bad Luck Charm
Same basics as above
Tailwind/Thunder Wave/Icy Wind
Feather Dance
Snarl
Sucker Punch/Roost
A Doubles supportive set. Tailwind/T-Wave are easy speed control; one temporarily raises speed for your side, the other lowers 1 target permanently with a chance of inaction. Icy Wind is if you fear Taunt, don’t mind Prankster’s priority, or want to break a Sash.
Feather Dance and Snarl lower the offensive threat of opponents.
If you want to finish off opponents quickly, Sucker Punch is priority. For sustain, Roost will heal.
Since this set focuses on lowering offensive pressure, DO NOT RUN Foul Play! And since Swagger was nerfed to have lower confusion rate, I wouldn’t recommend using it against opponents when combo’d with Foul Play.
Other moves can be Spite, Snatch, or Screech. Spite ruins Pokémon who use low-PP moves. Snatch prevents opposing self-buffing moves like Synthesis or Cosmic Power, and steals them for its own use. Screech can be used next to a physical ally to demolish a single target.