Sashia watched the race between Liam and Tapu Koko, and heard Liam asked what Z crystal he had. Though she heard Jen question, so she ignores Liam for the moment. 
"Well Riolu and it evolution Lucario are both Pokemon very strongly connect to a force known as Aura while Lucario can control it, Riolu at best can only feel it but if it's touching it's trainer then the trainer is able to see though their eyes, once it evole then you'll be able to see without it touching you, After Mike almost lost an eye when he protected a young Pokemon from a predator, he could not see out his eye for At least 6 months so his Riolu became his eyes helping Mike to also unlock his own connection to Aura which is  why Mike does not even need to direct his Pokemon in battle since they know what he wants them to do" Sashia told Jen as she brought up Riolu pokedex entry over the few region it had appeared in, Reading them to her still as a whisper since she did not want the others to know yet.