well I think there is a mission where u have to rescue a pikachu after the credits(I wached a vid of someone doing it XD)
find it in a dungeon
up your butt
You can evolve Riolu with the Sun Ribbon.
you can obtain a sun ribbon by completing the special epicode "Todays oh my gosh" after go to kangasgan storage and pick it up.HEYHEY YOU CAN EVOLVE riolu with this thing!
Some missions can give a reward. It can be a lunar ribbon.
I don't think you can get a Sun Ribbon in Platinum. I think its only on Mystery Dungeon.
you need the sun ribbon
People have said that it evolves riolu into lucario
u need to go to 20th floor of Northwind dungeon.
get a sun ribbon and train for a while
It is an evolution item need for Feebas to evolve into Milotic.
If you have Pokemon mystery dungeon explorers of sky after you complete the third special episode your rewarded a sun ribbon