Funny how you just make up what it OHKOs and 2HKOs. Let's run some actual damage calculations, shall we?
(All defending pokemon are Max HP/Max Def)
Shadow Claw vs Gengar - [Damage: 70.99% - 83.64%]
So he can 2HKO Gengar.
Thunderbolt vs Skarmory - [Damage: 46.11% - 54.19%]
Hmm, interesting. 3HKO, counting the leftovers recovery and if you don't get max damage twice in a row, which is unlikely.
Thunderbolt vs Gyarados - [Damage: 62.69% - 73.86%]
Wow, are you serious? It can only 2HKO a Gyarados?
Thunderbolt vs Aerodactyl - [Damage: 40.66% - 47.80%]
3HKO on something with defenses that bad.
Thunderbolt vs Slowbro - [Damage: 36.04% - 42.39%]
That's a 3-4HKO when you include leftovers recovery.
Shadow Claw vs Slowbro - [Damage: 40.61% - 47.72%]
A little more, still a 3HKO. Include Slack Off and good luck killing this little guy.
That's all the damage calculations I'm going to do for now, but I have yet to find something that Banette OHKOs.
Funny how you just make up what it OHKOs and 2HKOs. Let's run some actual damage calculations, shall we?
(All defending pokemon are Max HP/Max Def)
Shadow Claw vs Gengar - [Damage: 70.99% - 83.64%]
So he can 2HKO Gengar.
Thunderbolt vs Skarmory - [Damage: 46.11% - 54.19%]
Hmm, interesting. 3HKO, counting the leftovers recovery and if you don't get max damage twice in a row, which is unlikely.
Thunderbolt vs Gyarados - [Damage: 62.69% - 73.86%]
Wow, are you serious? It can only 2HKO a Gyarados?
Thunderbolt vs Aerodactyl - [Damage: 40.66% - 47.80%]
3HKO on something with defenses that bad.
Thunderbolt vs Slowbro - [Damage: 36.04% - 42.39%]
That's a 3-4HKO when you include leftovers recovery.
Shadow Claw vs Slowbro - [Damage: 40.61% - 47.72%]
A little more, still a 3HKO. Include Slack Off and good luck killing this little guy.
That's all the damage calculations I'm going to do for now, but I have yet to find something that Banette OHKOs.