Pokémon learn moves roughly every 4-5 levels normally. Panslash should have Scratch, Leer, Lick and Taunt by lv18. What kind of team are you rocking right now?
Have you made sure you have the proper base download, since there was a mix up initially, and Revengeance.2, the patch I posted above? Do you have any error messages you can show that would help speed up finding the errors?
Due to a few weird progression bugs and other minor things, here's a Revengeance.1 patch for all of you. Make sure you've redownloaded from the main post to make sure you got the update from yesterday before applying this patch (which is simply extract into the folder)