diff --git a/include/constants/item_config.h b/include/constants/item_config.h
index 04eb7a5470..8689de640c 100644
--- a/include/constants/item_config.h
+++ b/include/constants/item_config.h
@@ -28,5 +28,6 @@
 #define P_DIVE_BALL_MODIFIER    GEN_3   // In Gen4+, Dive Ball's effectiveness increases by when Surfing or Fishing.
 #define P_DUSK_BALL_MODIFIER    GEN_7   // In Gen7+, Net Ball's catch multiplier is x3 instead of x3.5.
 #define P_QUICK_BALL_MODIFIER   GEN_7   // In Gen5+, Quick Ball's catch multiplier is x5 instead of x4.
+#define P_DREAM_BALL_MODIFIER   GEN_8   // In Gen8+, Dream Ball's catch multiplier is x4 when the target is asleep.
 
 #endif // GUARD_CONSTANTS_ITEM_CONFIG_H
diff --git a/src/battle_script_commands.c b/src/battle_script_commands.c
index 0e087266b7..750f1a6fd5 100644
--- a/src/battle_script_commands.c
+++ b/src/battle_script_commands.c
@@ -9926,6 +9926,14 @@ static void Cmd_handleballthrow(void)
                         ballMultiplier = 35;
                     #endif
                 break;
+            case ITEM_DREAM_BALL:
+                #if P_DREAM_BALL_MODIFIER >= GEN_8
+                    if (gBattleMons[gBattlerTarget].status1 & STATUS1_SLEEP)
+                        ballMultiplier = 40;
+                #else
+                    ballMultiplier = 10;
+                #endif
+                break;
             }
         }
         else