The riolu in Pokemon platinum game isn't evolvin it has had poffins till it cant eat and has had energy drinks and spa treatments it says its happy on the poketch it ain't evolvin its lv 94 wot do i?

In Pokémon Platinum, Riolu evolves into Lucario when it has high friendship and reaches level 35. Since your Riolu is at level 94 and still hasn't evolved, it's likely that friendship is the issue. Try using the Friendship Checker app on your Poketch to verify its friendship level. If it's not high enough, continue to increase it by walking with Riolu, battling, and using items like the Soothe Bell.