on the far left in the city
He doesn't have a house in Violet City, not even in the game. Steven's house is in Ruby, Sapphire, and Emerald Versions. That's all I know.
Violet City, if you are entering the city from the east, go west until you hit a house surrounded by trees, in there.
Then you have failed...............
At mosedeep city
I believe you find his house in Mossdeep City.
After you reach Violet town go onto the next route and keep going forward with no turns and when you go in the house you'll see a man with a brown hat and Prof. Oak.
get a bellsprout and trade with a school kid in a house in violet city
(This is for both Heartgold and Soulsilver) You must beat Red at the top of Mt. Silver, then go to Mr. Pokemon's house (Between Violet City and Cherrygrove City) and he will give you the Blue orb/Red orb depending what game you have.
mr. Pokemon house
You can't get under bill's house.
they are in Ecruteak City, in the house behind the Pokemon center
It is in the house next to the Pokemon Center in Olivine City.