Once you capture Riolu when it's not an important part to the story, you can keep it unless you use its Field move, poke assist, or release it on purpose
go into almia castile and search around
You get riolu when you go to Almia Castle to search for the blue gem.
The Riolu in question will be Level 30.
you go to the almia castle.go straight and there would be a big block of ice.find the the pokemon that has the poke asssist to destroy it.than keep on going until you get to a room that is made out of ice.go right or left and keep on going until you get into the room that has a riolu in it.
Wevile is in the room of Almia Castle with the the two Riolu statues after you beat the game.
To get through that blue energy wall in Pokemon Ranger Shadows of Almia in the Almia castle, capture Froslass as a boss, have 2 Riolu's in the party and use it's power.
Riolu is located at Almia Castle left and right by going through the ice maze
you can you just need ranger net with a wireless internet connection
No you can't
you cant
Go to the castle in the top of haruba village there are two in there hope i helped (and i hope im making sense)
Almia Castle