Originally Posted by Fat Kiebin
How do you RNG dustclouds/surf spots/shaking grass? Just walk around and hope they appear?
Well from experience when I was RNGing Drilbur, the shaking spots are so random. They can appear in less than a minute, maybe two minutes. It's just random. One way to best ensure that you can successfully RNG those spots is to get frames higher than 3 and less than 2 Pokemon's in your Party, preferably just that syncher, if you can.
Make sure it's at a higher level than the Pokemons in your area or else Repels won't repel Pokemons. It's the same as RNGing wild Pokemons, but if you're going to do shaky spots, prepare to pick up items and restart your timer every time. It's a hassle.. I don't know about the other two spots and if items appear or not.