Steven's house is in Mossdeep City...(the city with the 7th gym) IF i can remember correctly it is a little to the below left of the gym. Inside the house you will find a note on the table and a pokeball. Inside the pokeball will contain a Beldum.
Ruby and the Rockits - 2009 We Aren't the Champions 1-8 was released on: USA: 8 September 2009
he isn't in ruby/sapphire/emerald
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With ruby at thrhe same house
The ruby dragon is in the entrance to the attic in the treasure box
in mossdeep city
route 110
at the faq house
in petalburg city
At littleroot town its the left or right house.
you go to a house i fallabar town in that house you see pr.cosmo
it is a book so i am not sure but the house must be haunted