I was level grinding on Route 117 and battled an Illumise with my Kangaskahn and I used Ice Punch, and missed! The only way I can explain this was the dexnav exclusive item Brightpowder, but I was on my bike. My understanding is you can't encounter dexnav spots if you're on the bike, you'll scare them away before you get there. Can any one explain this? Have I just exposed these exclusive items as very much NOT exclusive? Is it possible to ride up fast on a dexnav spot without scaring the Pokemon?
The Illumise must have held a Bright Powder. It has a 5℅ chance of finding one in the wild randomly.
Hope I helped!