You will delete all of your saved data Pokemon and items
Yes, unfortunealy, they will.
silver, gold, soul silver, and heart gold
Heart Gold and Soul Silver
pokemon heart gold and soul silver. and heart gold and soul silver legends
In Gold and silver you can get 1 at silver mountain, however you can not get it in heart gold or soul silver.
heart gold, soul silver, silver, crystal and gold
May is from Gold Silver Crystal Heart Gold and Soul Silver
No
celbi cannot be cached on Pokemon heart gold and soul silver to get celbi in gold and silver you haft to cheat sorry:( not god at English
No you can not. You have to be near a moss stone or something like that and heart gold and soul silver does not have it.
There is no hippowdon in heart gold and soul silver for more info go to: serebii.net
Only in Silver, Crystal, Gold and Heart Gold, Soul Silver.