Once you've beaten the Elite Four and unlocked the National Dex by talking to Professor Rowan, Swarms will begin to appear in Pokémon Brilliant Diamond and Shining Pearl.
These are groups of the same Pokémon that you can catch as normal. The swarm available changes each day, so you'll need to find out where it is.
To check a swarm's location:
- For the first instance, visit Lucas/Dawn in Twinleaf Town, and speak to their little sister.
- Following this first interaction, you can simply bring up the menu to check swarm locations.
Swarms are different in that you'll see the clusters of Pokémon appear on the overworld.
You'll find the following swams in these locations:
- Absol -- Route 213
- Beldum-- Route 228
- Corsola -- Route 230
- Cubone -- Route 203
- Delibird -- Route 216
- Doduo -- Route 201
- Drowzee -- Route 215
- Dunsparce -- Route 208
- Electrike -- Valley Windworks
- Farfetch'd -- Route 221
- Krabby -- Channel 226
- Lickitung -- Lake Valor
- Magnemite -- Fuego Ironworks
- Makuhita -- Route 225
- Natu -- Route 224
- Nosepass -- Route 206
- Phanpy -- Route 207
- Pidgey -- Route 229
- Skitty -- Route 222
- Slakoth -- Eterna Forest
- Smoochum -- Lake Acuity
- Snubbull -- Route 209
- Spinda -- Route 227
- Spoink -- Route 214
- Surskit -- Lake Verity
- Swinub -- Route 217
- Voltorb -- Route 218
- Zigzagoon -- Route 202
