Route 228 is where you can find a protector.
Route 228
you can make sure you have got a traded pokemon holding a protector or try to find a rhydon on wifi trade and make sure you get then stupid protector
make rhydon hold the protecter and trade it then it will evolve
Protector when attached to Rhydon and traded evolves Rhydon into Rhyperior.
Rydon if you give the if you make him hold the protector when he gets traded
You can find Pidey in a Pokemon Outbreak in Pokemon Diamond
Rhydon
where do i find a totodile in Pokemon diamond/pearl on nintendods
You can not find or get manaphy on Pokemon diamond but you can by hacking, trading or... if you have Pokemon ranger you have to complete the manaphy mission and then you can put it onto diamond.
I remember finding one south of Vielstone city, but Diamond had it south of Stark Mountain... Perhaps this is because Ryhperior is in the new Sinnoh dex.
You can't find a Ho-ho in Pokemon Diamond. You have to migrate.
To get a Manaphy in Pokemon Diamond you have to get Pokemon ranger and defeat it and you have to trade it to Pokemon Diamond,Platinum or Pearl.