Need help with a gen 4 riolu moveset and EVs for the Battle Tower

Riolu - Great League Pokedex riolu moveset Moves marked with an asterisk must be chain bred onto Riolu in Generation V; Moves marked with a double dagger can only be bred from a Pokémon who riolu moveset HOW TO GET RIOLU IN POKEMON BRILLIANT DIAMOND SHINING PEARL + LUCARIO

how to evolve riolu how to get riolu? how to evolve pokemon? why lucario is legend? best moveset of lucario pvp