My boyfriend works at a pet store and they always keep clowns together.
Pet shop fish are commonly kept in small tanks, under stressful conditions, and have very little chance to establish territory.
I guess I am a bit confused. Your initial question was:
Can the false percula live with a maroon clown and my fish is just evil or can they not live together.
Which every here pretty much answered, but then you state:
My boyfriend works at a pet store and they always keep clowns together. I had a picasso clown and added two more picassos and they all 3 got along just fine. I have NEVER had any problems mixing clowns.
You asked a question, several people provided their knowledge and experience - this likely will not work in a small tank.
And a maroon clown is extremely aggressive. (Ask the scar on my ring finger). It will soon outgrown the Perc (and your tank).
my false is hosting in my flower pot and of corse will not let him near but seams like my false keeps looking for him. my false will pick on my yellow tail damsel but will not mess with my yellow tang or scotter blenny.
If you have 2 clowns, a damsel, a Yellow tang, and a scooter blenny, you would be overstocked if you had a 75g tank. And the absolutely smallest tank a Yellow Tang should be in is a 75g. A scooter blenny also needs a failry large, established tank. How old/mature is this tank? IMO, you are asking for disaster with this bioload and mix of fish. JMO