Is it worth posting a question about a shadow claw gengar every single day?
yeah...
Answers
Shadow claw Gengar has the highest DPS against Mewtwo. However it also dies from three or four confusions.
Gengar has a unique triple resistance to focus blast. I'll use my shadow claw Gengar against focus blast Mewtwo and laugh as it outlasts all the Tyranitars!!
If you wanna three man a Mewtwo, it's crucial to run shadow claw Gengar!!
I have a 53% shadow claw gengar, should i power it up???!!!
Those points are pretty much the jist of every single shadow claw Gengar post. For a pokemon with less durability against Mewtwo than Sharpedo it does attract an amazing amount of questions.
Agree with @gluglumaster, against PC it is survive long enough and can take one focus blast. Even against confusion it can fire one shadow ball if you power it up to high level ( max out for me) and if you lucky enough
You wont see any benefit using it if you only raid with a big group of trainer though.