>>41592366That is how it works. I got a Togekiss to spawn by repeatedly moving away from a spot where a Braviary normally spawned until the Braviary disappeared and coming back until it had been replaced with said Togekiss. If you just go near some grass where Pokémon spawn and move away, it's easy to see that they were despawned when new Pokémon spawn to replace them. It's a good thing to know since you can go in circles around the Lake of Outrage passing by the grass until what you want spawns.