Sketchy
 

How is the ability sketchy used? I’m assuming they have to be in the stash face up from a previous play in the same round?
I don’t think you can cheat with it and use the ability the same turn

Re: Sketchy
 

From the rules:
Sketchy
A keyword ability. This ability is not available to a player until they have been caught cheating this turn.
You can't do it with the same card so use any card first, get caught, then boom.

Re: Sketchy
 

Generally what you need to do is get caught cheating early in the turn, and then later, when you successfully hire a Monster with Sketchy, you can use the ability.

I believe you're likely looking at Legbreaker Joe, and he has to be both successfully hired and then survive the fight to end up face-up in the stash. Because his ability is only usable from the Stash, you can play him first, get caught cheating later, and then active his ability.