matty was walking through the forest when a small riolu jumped out. matty had heard that many riolu's lived in the forest but this one was yellow! so he followed it silently and then brought out a pokeball containing his turtwig. come on turtwig dont let me down, he whispered and threw it out. turtwig used sleep powder and it fell to sleep then matty brought out a pokeball and captured it!
but he worried that the riolu may have been hurt by the sleeping powder he hurried to the pokemon centre and healed it.

i think riolu is cool on ds ive got lucario which riolu evolves into that