From 22fb105f70d3c328d05d9de0cd61e0a1f721c95d Mon Sep 17 00:00:00 2001
From: hedara90 <90hedara@gmail.com>
Date: Sat, 27 Dec 2025 09:53:44 +0100
Subject: [PATCH] Fix Mimic trying to access MOVE_UNAVAILABLE in an incredibly
 small amount of possible scenarios (#8685)

---
 src/battle_script_commands.c    |  8 ++++----
 test/battle/move_effect/mimic.c | 16 ++++++++++++++++
 2 files changed, 20 insertions(+), 4 deletions(-)

diff --git a/src/battle_script_commands.c b/src/battle_script_commands.c
index 86f1b117e4..411421a29a 100644
--- a/src/battle_script_commands.c
+++ b/src/battle_script_commands.c
@@ -11303,10 +11303,10 @@ static void Cmd_mimicattackcopy(void)
 {
     CMD_ARGS(const u8 *failInstr);
 
-    if ((IsMoveMimicBanned(gLastMoves[gBattlerTarget]))
-        || (gBattleMons[gBattlerAttacker].volatiles.transformed)
-        || gLastMoves[gBattlerTarget] == MOVE_NONE
-        || gLastMoves[gBattlerTarget] == MOVE_UNAVAILABLE)
+    if (gLastMoves[gBattlerTarget] == MOVE_UNAVAILABLE
+     || gLastMoves[gBattlerTarget] == MOVE_NONE
+     || gBattleMons[gBattlerAttacker].volatiles.transformed
+     || IsMoveMimicBanned(gLastMoves[gBattlerTarget]))
     {
         gBattlescriptCurrInstr = cmd->failInstr;
     }
diff --git a/test/battle/move_effect/mimic.c b/test/battle/move_effect/mimic.c
index 4a51a4b79e..6ea6e3f1f8 100644
--- a/test/battle/move_effect/mimic.c
+++ b/test/battle/move_effect/mimic.c
@@ -1,4 +1,20 @@
 #include "global.h"
 #include "test/battle.h"
 
+SINGLE_BATTLE_TEST("Mimic doesn't error when the last move used by the target resolves to MOVE_UNAVAILABLE")
+{
+    GIVEN {
+        PLAYER(SPECIES_WOBBUFFET);
+        OPPONENT(SPECIES_WYNAUT);
+        OPPONENT(SPECIES_WOBBUFFET);
+    } WHEN {
+        TURN {MOVE(opponent, MOVE_TRANSFORM); MOVE(player, MOVE_MIMIC); }
+    } SCENE {
+        ANIMATION(ANIM_TYPE_MOVE, MOVE_TRANSFORM, opponent);
+        NOT ANIMATION(ANIM_TYPE_MOVE, MOVE_MIMIC, player);
+    } THEN {
+        EXPECT_EQ(gLastMoves[1], MOVE_UNAVAILABLE); // This test depends on the current implementation of Transform, if this changes, the test should be changed
+    }
+}
+
 TO_DO_BATTLE_TEST("TODO: Write Mimic (Move Effect) test titles")