Once the data pack is active alongside both the Cobblemon and Deeper and Darker mods, wild Pokemon will populate the deep underground landscape of the Otherside dimension.
Reaching the Otherside
1. Construct and activate an Otherside portal using the Deeper and Darker mod, making sure your Pokemon team is ready for exploration before stepping through.
2. Open Options > Video Settings and raise your Brightness slider if the underground terrain is too dark to spot movement at a distance.
3. Bring torches or other light sources to mark your path back to the portal while you roam.
Hunting Across Dark Biomes
1. Walk steadily through the dark biomes of the Otherside so wild Pokemon begin spawning across the nearby terrain.
2. Keep moving across wide stretches of the underground landscape rather than staying in a single cavern; covering ground lets distant creatures despawn and gives new wild Pokemon room to appear.
3. Approach a wild creature to battle or catch it just as you do in the Overworld. Before locking your attention onto a battle, check your immediate surroundings for hostile sculk mobs so nothing ambushes you mid-turn.