It's recommended to bring Max Repels so you don't accidentally encounter a wild Pokemon in a grass patch that isn't shaking. If your next encounter is not of the same species, the chain ends. Tips on Keeping up a Poke Radar Chain Max Repel
If no grass patch shook immediately after, your chain broke and you'll have to use the Poke Radar again. Walk over to the next grass patch to trigger the next battle in the chain. After the battle ends, up to 4 more patches of grass will start shaking automatically. Walk into the shaking grass then capture or defeat the Pokemon. Walking into this type of shaking grass gives the best chance of encountering Shiny Pokemon via the Poke Radar. The third and rarest type of grass has a shiny twinkle (✦) on it. Walking into this type of shaking grass is more likely to lead to an encounter with a Pokemon that is a Poke Radar exclusive and that has a Hidden Ability. The second type of shake has larger blades of grass coming out of it. The first one is a normal rustle, which is more likely to lead to an encounter with just a normal Pokemon. There will be 3 types of shaking grass identified by the Poke Radar. Abilties like Static or Flash Fire will make it more likely for you to encounter either Electric or Fire type Pokemon respectively. It is easier to start a chain if you have a Pokemon at the front of your party with a certain ability. Use Abilities to Find the Pokemon You Want You can only use it in the grass patches of these routes (the Poke Radar does not work in caves or while Surfing). The Poke Radar is the only way to encounter Pokemon not from the Sinnoh region or Shiny Pokemon on normal Sinnoh routes. If no grass patches shake, walk 50 steps to recharge, then use again If grass patches shake after encounter, repeat step 5. Spray Repel to avoid encounters from normal grassĭefeat or capture Pokemon encountered in shaking grass
Use Poke Radar from Key Items pocket to trigger shaking grass
How to Use the Poke Radar Steps on How to Use the Poke Radar