migrate it from leaf green or fire red
you can't weirdos
you can find a mankey on route 1 and 2
you can find stunkys on diamond on route 214.
You cannot catch a slowpoke,slowbro or slowking on diamond version. You can on Pokemon pearl version though.
There is no HM called dive in Pokemon Diamond you fat oaf.
You can't find Articuno in pokemondiamond but you can migrate it in pokemon leaf green version or pokemon fire red version.
I think you can find them in the Pearl Version of Pokemon. Since I have the Diamond version of Pokemon I had to trade a Pokemon (wireless) to obtain a glameow.
you go to the undergorund and find it
You can get it from evolving it atrually or with a very hard to find moonstone I think, or you can also find them in Mt coronet hope this helps a lot! Pokemon diamond version for sure!
buy the pocedex version 2
I think the best way to get an Eevee in Pokemon Diamond version is to find one in Trophy Garden and capture it from there.
You can find whismur at route 503, and mankey is currently a swarm pokemon, so you'll have to wait or trade for it.