I actually have a few, but my favourite one is Fury Cutter/Earthquake Nidoking. I caught him last winter I believe - he was level 30 already, and when I caught him I was surprised to learn he had 15 ivs in attack and defense (10 in stamina). I was a bit disappointed when I found out that the moveset was very poorly rated on gamepress, but I still kept him, even though I was considering transfering. Now that the raid battles are happening, you can find Nidoking with this particular moveset listed as a counter to electric bosses, and I've already used him a few times. Fury cutter generates energy quite well and then you can just spam Earthquake. I'm really glad that I ended up keeping him.
GamePress
Rarest Move Sets
Calling all scarcity fans! As a change of pace to the standard Q&A fare, I humbly submit a rarity challenge.
Of the Pokemon you currently have, do any of them have moves that you wouldn't expect another trainer to have? Legacy moves are probably the only ones with a decent chance but useless legacy moves undoubtedly have the best chance.
My top 5 candidates:
1. Starmie with Quick Attack
2. Voltorb with Signal Beam
3. Doduo with Swift
4. Gastly with Sucker Punch & Ominous Wind
5. Zubat with Sludge Bomb
So...are there other trainers out there who set aside a tiny portion of their Pokemon storage for the rarest move sets? If so, what are your top candidates for scarcity? And does anyone have mons with the same moves as my top 5 contenders?