im just woundering if u can get omega to show up if u get the dragon balls
No. To find Omega Shenron you go to Central/West City and fight Gotenks. After than Omega Shenron should show up to fight,.
but make sure that you have all 7 dragonballs before you beat buu inside buu and visit bulma to get the special dragon radar. really you just have to look for the old ps2 walk through on line some where.