Ho-oh is not in Pokemon diamond. It is at Navel Rock in Ruby, Sapphire , Emerald , FireRed and LeafGreen
migrate it from a gameboy Pokemon
oh
No
You can't find a Ho-ho in Pokemon Diamond. You have to migrate.
You can't get a Ho-oh in Pokemon Diamond.To get Ho-Oh in pokemon Diamond you have to trade with a copy of Pokemon Heart GoldORIf you have a ds or ds lite(not a 3ds or a dsi) and a copy of Pokemon Gold(that has Ho-Oh captured in it) you can transfer it from that!Hope I Helped!(\_/)(='.'=)(")_(")
get the Pokemon modifier cheat for action replay and u can get ho-oh
get an action replay, get code for "poke mod" other wise known as "pokemon modifier", then find ho-oh.
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nope
You have to Migrate it.
Migrate in from Pokemon gold/silver