diff --git a/src/battle_script_commands.c b/src/battle_script_commands.c
index 5ad5a1c642..84d58d6f64 100755
--- a/src/battle_script_commands.c
+++ b/src/battle_script_commands.c
@@ -13945,7 +13945,7 @@ static void Cmd_handleballthrow(void)
                 odds = 1048560 / odds;
                 for (shakes = 0; shakes < maxShakes; shakes++)
                 {
-                    if (RandomUniform(RNG_BALLTHROW_SHAKE, 0, MAX_u16) < odds)
+                    if (RandomUniform(RNG_BALLTHROW_SHAKE, 0, MAX_u16) >= odds)
                         break;
                 }
             }
diff --git a/test/battle/ability/ball_fetch.c b/test/battle/ability/ball_fetch.c
index a7513a701c..762225c0f0 100644
--- a/test/battle/ability/ball_fetch.c
+++ b/test/battle/ability/ball_fetch.c
@@ -15,7 +15,7 @@ WILD_BATTLE_TEST("Ball Fetch causes the Pokémon to pick up the last failed Ball
         PLAYER(SPECIES_YAMPER) { Ability(ABILITY_BALL_FETCH); }
         OPPONENT(SPECIES_METAGROSS);
     } WHEN {
-        TURN { USE_ITEM(player, item, WITH_RNG(RNG_BALLTHROW_SHAKE, 0) );}
+        TURN { USE_ITEM(player, item, WITH_RNG(RNG_BALLTHROW_SHAKE, MAX_u16) );}
         TURN {}
     } SCENE {
         if (item != ITEM_X_ACCURACY)
@@ -41,7 +41,7 @@ WILD_BATTLE_TEST("Ball Fetch doesn't trigger if the Pokémon is already holding
         PLAYER(SPECIES_YAMPER) { Ability(ABILITY_BALL_FETCH); Item(item); }
         OPPONENT(SPECIES_METAGROSS);
     } WHEN {
-        TURN { USE_ITEM(player, ITEM_GREAT_BALL, WITH_RNG(RNG_BALLTHROW_SHAKE, 0)); }
+        TURN { USE_ITEM(player, ITEM_GREAT_BALL, WITH_RNG(RNG_BALLTHROW_SHAKE, MAX_u16)); }
     } SCENE {
         if (item == ITEM_NONE)
         {
@@ -80,9 +80,9 @@ WILD_BATTLE_TEST("Ball Fetch only picks up the first failed ball, once per battl
         PLAYER(SPECIES_YAMPER) { Ability(ABILITY_BALL_FETCH); }
         OPPONENT(SPECIES_METAGROSS);
     } WHEN {
-        TURN { USE_ITEM(player, item, WITH_RNG(RNG_BALLTHROW_SHAKE, 0)); }
+        TURN { USE_ITEM(player, item, WITH_RNG(RNG_BALLTHROW_SHAKE, MAX_u16)); }
         TURN { MOVE(player, MOVE_BESTOW); }
-        TURN { USE_ITEM(player, item2, WITH_RNG(RNG_BALLTHROW_SHAKE, 0)); }
+        TURN { USE_ITEM(player, item2, WITH_RNG(RNG_BALLTHROW_SHAKE, MAX_u16)); }
     } SCENE {
         MESSAGE("You used Great Ball!");
         ABILITY_POPUP(player, ABILITY_BALL_FETCH);