diff --git a/src/battle_ai_main.c b/src/battle_ai_main.c
index ebbabf93c8..0623faf864 100644
--- a/src/battle_ai_main.c
+++ b/src/battle_ai_main.c
@@ -1,3 +1,5 @@
+// Note that FOE specifically returns the left-side battler; BATTLE_OPPOSITE is the diagonal.
+
 #include "global.h"
 #include "main.h"
 #include "malloc.h"
@@ -3098,45 +3100,44 @@ static s32 AI_DoubleBattle(u32 battlerAtk, u32 battlerDef, u32 move, s32 score)
         }
         else
         {
-            u32 ownHitsToKOFoe1 = GetBestNoOfHitsToKO(battlerAtk, FOE(battlerAtk), AI_ATTACKING);
-            u32 partnerHitsToKOFoe1 = GetBestNoOfHitsToKO(battlerAtkPartner, FOE(battlerAtk), AI_ATTACKING);
-            u32 ownHitsToKOFoe2 = GetBestNoOfHitsToKO(battlerAtk, FOE(battlerAtkPartner), AI_ATTACKING);
-            u32 partnerHitsToKOFoe2 = GetBestNoOfHitsToKO(battlerAtkPartner, FOE(battlerAtkPartner), AI_ATTACKING);
+            u32 ownHitsToKOFoe1 = GetBestNoOfHitsToKO(battlerAtk, BATTLE_OPPOSITE(battlerAtk), AI_ATTACKING);
+            u32 partnerHitsToKOFoe1 = GetBestNoOfHitsToKO(battlerAtkPartner, BATTLE_OPPOSITE(battlerAtk), AI_ATTACKING);
+            u32 ownHitsToKOFoe2 = GetBestNoOfHitsToKO(battlerAtk, BATTLE_OPPOSITE(battlerAtkPartner), AI_ATTACKING);
+            u32 partnerHitsToKOFoe2 = GetBestNoOfHitsToKO(battlerAtkPartner, BATTLE_OPPOSITE(battlerAtkPartner), AI_ATTACKING);
 
             if (hasTwoOpponents)
             {
                 // Might be about to die
-                if (CanTargetFaintAi(FOE(battlerAtk), battlerAtk) && CanTargetFaintAi(FOE(battlerAtkPartner), battlerAtk) 
-                 && AI_IsSlower(battlerAtk, FOE(battlerAtk), move, predictedMove, DONT_CONSIDER_PRIORITY)
-                 && AI_IsSlower(battlerAtk, FOE(battlerAtkPartner), move, predictedMove, DONT_CONSIDER_PRIORITY))
+                if (CanTargetFaintAi(BATTLE_OPPOSITE(battlerAtk), battlerAtk) && CanTargetFaintAi(BATTLE_OPPOSITE(battlerAtkPartner), battlerAtk) 
+                 && AI_IsSlower(battlerAtk, BATTLE_OPPOSITE(battlerAtk), move, predictedMove, DONT_CONSIDER_PRIORITY)
+                 && AI_IsSlower(battlerAtk, BATTLE_OPPOSITE(battlerAtkPartner), move, predictedMove, DONT_CONSIDER_PRIORITY))
                     ADJUST_SCORE(GOOD_EFFECT);
 
                 if (ownHitsToKOFoe1 > partnerHitsToKOFoe1 && partnerHitsToKOFoe1 > 1
                  && ownHitsToKOFoe2 > partnerHitsToKOFoe2 && partnerHitsToKOFoe2 > 1)
                     ADJUST_SCORE(GOOD_EFFECT);
             }
-            else if (IsBattlerAlive(FOE(battlerAtk)))
+            else if (IsBattlerAlive(BATTLE_OPPOSITE(battlerAtk)))
             {
                 // Might be about to die
-                if (CanTargetFaintAi(FOE(battlerAtk), battlerAtk)
-                 && AI_IsSlower(battlerAtk, FOE(battlerAtk), move, predictedMove, DONT_CONSIDER_PRIORITY))
+                if (CanTargetFaintAi(BATTLE_OPPOSITE(battlerAtk), battlerAtk)
+                 && AI_IsSlower(battlerAtk, BATTLE_OPPOSITE(battlerAtk), move, predictedMove, DONT_CONSIDER_PRIORITY))
                     ADJUST_SCORE(GOOD_EFFECT);
 
                 if (ownHitsToKOFoe1 > partnerHitsToKOFoe1 && partnerHitsToKOFoe1 > 1)
                     ADJUST_SCORE(GOOD_EFFECT);
             }
-            else if (IsBattlerAlive(FOE(battlerAtkPartner)))
+            else if (IsBattlerAlive(BATTLE_OPPOSITE(battlerAtkPartner)))
             {
                 // Might be about to die
-                if (CanTargetFaintAi(FOE(battlerAtkPartner), battlerAtk) 
-                 && AI_IsSlower(battlerAtk, FOE(battlerAtkPartner), move, predictedMove, DONT_CONSIDER_PRIORITY))
+                if (CanTargetFaintAi(BATTLE_OPPOSITE(battlerAtkPartner), battlerAtk) 
+                 && AI_IsSlower(battlerAtk, BATTLE_OPPOSITE(battlerAtkPartner), move, predictedMove, DONT_CONSIDER_PRIORITY))
                     ADJUST_SCORE(GOOD_EFFECT);
 
                 if (ownHitsToKOFoe2 > partnerHitsToKOFoe2 && partnerHitsToKOFoe2 > 1)
                     ADJUST_SCORE(GOOD_EFFECT);
 
-            }
-            
+            }            
         }
         break;
     case EFFECT_PERISH_SONG: