get Roselia to a high level then give her a shiny stone
Roserade does not evolve.
Roselia to Roserade and Togetic to Togekiss
In Pokemon Diamond (and Pearl), Cynthia's first Pokemon is a Spiritomb. Her other 5 Pokemon are Garchomp, Gastrodon, Roserade, Milotic, and Lucario.
no ,you can't get your team rated in pokemon diamond
The Pokémon the second Gym Leader has in "Diamond" are Cherubi, Turtwig and Roserade.
Spiritomb Milotic Lucario Roserade Garchomp Gastrodon
Roserade. But it takes patience to train it from a Budew at the beginning of a game
Floatzel Snorlax Heracross Roserade Staraptor Empoleon/Torterra/Infernape
yes
diamond and pearl spirttomb garchomp roserade gastrodon milotic and lucario platinum spirttomb garchomp roserade lucario milotic and togekiss
Cherubi (LV. 19) / Turtwig (LV. 19) / Roserade (LV. 22)
I pretty sure Roselia evolves into roserade using a shiny stone