you can't really catch dialga on ruby, but you can use an action replay to get it because you can pretty much catch any Pokemon with an action replay
In fact, you can.
Dialga doesn't exist in ruby. It was created long afterwards.
Dialga Palkia, Rayquaza,Kygore and Groudon
If you beat Dialga and Dialga faints, you can no longer catch it.
It depends on which game. you can catch dialga on pearl with a code
You can catch it by first turning Dialga's HP into the red. Then use Ultra Balls or Dusk Balls to catch Dialga. It will take time, and you need to use a few balls to catch Dialga.
dialga
You can only catch dialga in dimonid
After you catch Dialga, you do not see the boss again! By Tom Nunn After you catch Dialga, you do not see the boss again! By Tom Nunn
You can catch Dialga in Spear Pillar
You cannot catch palkia in diamond and dialga in pearl but you can catch both of them in Pokemon platinum
no you can only find dialga in dimind