The Rival's Pokemon are:
Staraptor lv 36 (Normal/Flying)
Floatzel lv 35 (Water)
Heracross lv 37 (Bug/Fighting)
Rapidash lv 35 (Fire)
Torterra lv 38 (Grass/Ground)
Your Pokemon's levels are far too low to beat your rival so you will need to do some training. However, in general, use Luxray's electric moves to beat Staraptor and Floatzel, use Staraptor's flying moves to beat Heracross and Torterra, and use Prinplup's water moves to beat Rapidash. Bring along some super potions and heal whenever you need to. X Speed, X Attack, and X Special can be very useful for boosting those stats.
same as in hearthome city.. only higher levels - staravia lvl 34 - grotle, monferno, or prinplup lvl 36 - buizel level 32 (absent if he has prinplup) - Roselia level 32 (absent if he has grotle) - ponyta level 32 (absent if he has monferno)
In Pokemon platinum it learns it at level 28
Budew evolves into Roselia with: Max Friendship DayTime and then when you get these requirements, just level up! Then poof! You'll now have a Roselia, Roselia evolves into Roserade with a Shiny Stone
You have to use the shiny stone on roselia.
did you mean how to evolve Roselia into roserade? if so you need a shiny stone to evolve Roselia into roserade
same as in hearthome city.. only higher levels - staravia lvl 34 - grotle, monferno, or prinplup lvl 36 - buizel level 32 (absent if he has prinplup) - Roselia level 32 (absent if he has grotle) - ponyta level 32 (absent if he has monferno)
With a Shiny Stone
Roselia only evolves in Pokemon platinum, diamond, and pearl Roselia evolves into roserade if you use a sun stone on it
Catch a Roselia and evolve it
In Pokémon Platinum, you can find Roselia in the Trophy Garden as well as in Routes 208, 209, 210, 212, 221, 224, 229 and 230.
Shiny Stone
by a shiny stone in lake valor
Roselia only evolves in Pokémon Platinum, Diamond, Pearl, HeartGold and SoulSilver. In order to evolve Roselia, you have to use a Shiny Stone on it, it doesn't evolve by any level.
Pokemon Platinum, diamond and pearl. and black and white 5
Togetic into Togekiss and Roselia into Roserade
In Pokemon platinum it learns it at level 28
There is a socialite who only has a Roselia.