Thank you to the three users with your replies, they really helped ^.^ So, then, um, how do wandering NPCs advance frames? Like, how many frames per step? I know that WNPCs affect RNGing for Wonder Card legendaries, and thankfully there's Poke Centers without WNPCs (thanks for the answers!), so I can do that without worry. But do WNPCs also affect stationary legendaries that you RNG for? Like, will them moving affect the IVs? Because I know that IVs and nature are independent of each other. Whenever I RNG for a stationary legendary, it's just for the IVs and I use Synchronize (I feel like that's what you're supposed to do, sorry if I'm being redundant)