All you need is a masterball you just go to ho oh, click on it, and battle and use masterball. It will be at either lv 50 or 40 I forgot I think 50
No, you need to evolve a Dragonair.
you need a silver wing
You'll need to trade it from Pokemon Diamond, Pearl, or Platinum.
you can't sorry NEED HEARTGOLD
::::::You can not get cresselia in Pokemon heartgold::::::::::::Yes you can!!! I have one! Well i have 2 because i got them from a trade but i sitll have them!:::: :Dno u dont you need to catch it in pearl and trade
Yes. In whirl island but you need a special item.
you need lugia & Ho-oh :-P
Yes, you need to complete the Johto Pokedex to get the Hoenn Sound device, which allows you to catch Hoenn pokemon in the wild.
You can't catch Cranidos in the wild or from a special event. You'll need to trade for it from Pokemon Diamond, Pearl, or Platinum.
You can't catch a Mew in the wild. You'll need to trade for it or use the Action Replay.
you need the blue orb which is only obtainable in heartgold
you need action replay go to youtube to get the code