In Pokemon ash comes home from the Hoenn league to find misty at his house What episode is?

That doesn't happen in the anime. While Ash does go home after the Hoenn League, Misty isn't there. She stays in the Orange Islands until the Johto region.

You might be thinking of the episode "A Wish for the Future!" where Ash visits his mom and receives a letter from Misty. This episode is part of the Advanced Generation (Season 6), specifically episode 152.