Arceus
In Pokemon Diamond, you can get a few rare Pokemon by just following the basic story. They are Dialga, Uxie, Mesprit, and Azelf. There might be some more, though. If you do a special event, you can also catch an Arceus, Shaymin, and a whole bunch more rare Pokemon. Hope this helped!
A rare Pokemon you can get by going to an event at places such as Gamestop and Toys R Us. Some examples are Arceus, Darkrai, Shaymin, and Shiny Pichu.
it is a member card that you use to get alot of RARE POKEMON like,arceus,shaymin,and darkrai .hope i helped.
Because they are "Special Event Pokemon", which is used to promote the Pokemon and Nintendo franchise every year when a new Pokemon film is released in Japan. The locks keep the Pokemon rare in the game. ----
Rare Pokemon in PearlO.K. lets see there is mesprit, uxie, azelf, palkia, dialga, arceus, heatran, regigigas, cresselia, rotom, giratina, lucario, darkrai, and a few others you can migrate also but that's all i can think of right now shaymin
buy it from the rare Pokemon store in mt.coronet
Golden Arceus
manaphy or arceus
if you mean legends, you can find Palkia, Azelf Uxie and Mesprit, then after the elite four you can find Giratina, Cressilia, Heatran, and with the promos or game hacks you can find Darkrai, Shaymin, and Arceus
"Gold Arceus is Shiny Arceus. It is EXTREMELY rare to get a Shiny Arceus. It is rare to get a Shiny Starly by comparison." i think our little friend was was refering to A.R.
No Shaymin is not a legendary for several reasons, firstly it has appeared in many Pokemon movies/episodes with more than one of them. Secondly it is like Zoroark, Zorua, Phione and lucario these are all just rare pokemon!
OK how do you get Darkrai,Articuno,and Arceus on Pokemon Platinum? buy them at the rare Pokemon store