raise it to level 30 then go to luminous springs

You need a sun ribbon

raise it to at least level 30 and raise its friendship up by giving it a soothe bell and
taking it to the m***age girl in veilstone city.

I dont have a riolu in PMD:EOT, but geodude794 wuz referring to the one in Diamond/ Pearl.

have him lvl 35+ sun ribbon and put his iq a little bit up

1: need sun ribbon
2: level doesnt matter, i got mine @ lv 20
3: needs 2 know brick tough iq stat