The hidden world...

In a place called poketown lived a riolu and his best friend shinx they played and played but one day there place was attacked by an evil Pokemon known as Zekrom away back it was in a battle with mewtwo and was beaten then sent to an under ground place where it would never escape... but then riolu woke up shinx and packed there stuff and ran away from there home after a day they were rescued by 3 machamps and they we're taken to a world they never new ecsisted