Adds B_VAR_DIFFICULTY and related functions READ DESC

asm/macros/event.inc

@@ -2338,3 +2338,21 @@
 	.macro hideitemdescription
 	callnative ScriptHideItemDescription
 	.endm
+
+	.macro increasedifficulty
+	callnative Script_IncreaseDifficulty
+	.endm
+
+	.macro decreasedifficulty
+	callnative Script_DecreaseDifficulty
+	.endm
+
+	.macro getdifficulty var:req
+	callnative ScrCmd_getdifficulty
+	.2byte \var
+	.endm
+
+	.macro setdifficulty difficulty:req
+	callnative ScrCmd_setdifficulty
+	.byte \difficulty
+	.endm

data/event_scripts.s

@@ -20,6 +20,7 @@
 #include "constants/contest.h"
 #include "constants/daycare.h"
 #include "constants/decorations.h"
+#include "constants/difficulty.h"
 #include "constants/easy_chat.h"
 #include "constants/event_objects.h"
 #include "constants/event_object_movement.h"

include/config/battle.h

@@ -194,6 +194,7 @@
 #define B_VAR_STARTING_STATUS       0     // If this var has a value, assigning a STATUS_FIELD_xx_TERRAIN to it before battle causes the battle to start with that terrain active.
 #define B_VAR_STARTING_STATUS_TIMER 0     // If this var has a value greater or equal than 1 field terrains will last that number of turns, otherwise they will last until they're overwritten.
 #define B_VAR_WILD_AI_FLAGS         0     // If not 0, you can use this var to add to default wild AI flags. NOT usable with flags above (1 << 15)
+#define B_VAR_DIFFICULTY            0     // If not 0, you can use this var to control which difficulty version of a Trainer is loaded.
 
 // Sky Battles
 #define B_FLAG_SKY_BATTLE                 0     // If this flag has a value, the player will be able to engage in scripted Sky Battles.

include/constants/battle_partner.h

@@ -2,7 +2,8 @@
 #ifndef GUARD_CONSTANTS_BATTLE_PARTNERS_H
 #define GUARD_CONSTANTS_BATTLE_PARTNERS_H
 
-#define PARTNER_NONE                0
-#define PARTNER_STEVEN              1
+#define PARTNER_NONE 0
+#define PARTNER_STEVEN 1
+#define PARTNER_COUNT 2
 
 #endif  // GUARD_CONSTANTS_BATTLE_PARTNERS_H

include/constants/difficulty.h

@@ -0,0 +1,15 @@
+#ifndef GUARD_DIFFICULTY_CONSTANTS_H
+#define GUARD_DIFFICULTY_CONSTANTS_H
+
+enum DifficultyLevel
+{
+    DIFFICULTY_EASY,
+    DIFFICULTY_NORMAL, //If you rename this, the word "Normal" in fprint_trainers must be replaced with the new difficulty name.
+    DIFFICULTY_HARD,
+    DIFFICULTY_COUNT,
+};
+
+#define DIFFICULTY_MIN 0
+#define DIFFICULTY_MAX (DIFFICULTY_COUNT - 1)
+
+#endif // GUARD_DIFFICULTY_CONSTANTS_H

include/data.h

@@ -3,6 +3,8 @@
 
 #include "constants/moves.h"
 #include "constants/trainers.h"
+#include "constants/battle.h"
+#include "difficulty.h"
 
 #define MAX_TRAINER_ITEMS 4
 
@@ -164,8 +166,8 @@ extern const union AnimCmd *const sAnims_Trainer[];
 extern const struct TrainerSprite gTrainerSprites[];
 extern const struct TrainerBacksprite gTrainerBacksprites[];
 
-extern const struct Trainer gTrainers[];
-extern const struct Trainer gBattlePartners[];
+extern const struct Trainer gTrainers[DIFFICULTY_COUNT][TRAINERS_COUNT];
+extern const struct Trainer gBattlePartners[DIFFICULTY_COUNT][PARTNER_COUNT];
 
 extern const struct TrainerClass gTrainerClasses[TRAINER_CLASS_COUNT];
 
@@ -191,71 +193,103 @@ static inline u16 SanitizeTrainerId(u16 trainerId)
 
 static inline const struct Trainer *GetTrainerStructFromId(u16 trainerId)
 {
-    return &gTrainers[SanitizeTrainerId(trainerId)];
+    u32 sanitizedTrainerId = SanitizeTrainerId(trainerId);
+    u32 difficulty = GetTrainerDifficultyLevel(sanitizedTrainerId);
+
+    return &gTrainers[difficulty][sanitizedTrainerId];
 }
 
 static inline const u8 GetTrainerClassFromId(u16 trainerId)
 {
-    return gTrainers[SanitizeTrainerId(trainerId)].trainerClass;
+    u32 sanitizedTrainerId = SanitizeTrainerId(trainerId);
+    u32 difficulty = GetTrainerDifficultyLevel(sanitizedTrainerId);
+
+    return gTrainers[difficulty][sanitizedTrainerId].trainerClass;
 }
 
 static inline const u8 *GetTrainerClassNameFromId(u16 trainerId)
 {
+    u32 difficulty = GetBattlePartnerDifficultyLevel(trainerId);
+
     if (trainerId > TRAINER_PARTNER(PARTNER_NONE))
-        return gTrainerClasses[gBattlePartners[trainerId - TRAINER_PARTNER(PARTNER_NONE)].trainerClass].name;
+        return gTrainerClasses[gBattlePartners[difficulty][trainerId - TRAINER_PARTNER(PARTNER_NONE)].trainerClass].name;
     return gTrainerClasses[GetTrainerClassFromId(trainerId)].name;
 }
 
 static inline const u8 *GetTrainerNameFromId(u16 trainerId)
 {
+    u32 sanitizedTrainerId = SanitizeTrainerId(trainerId);
+
+    u32 difficulty = GetTrainerDifficultyLevel(sanitizedTrainerId);
+
+    u32 partnerDifficulty = GetBattlePartnerDifficultyLevel(trainerId);
+
     if (trainerId > TRAINER_PARTNER(PARTNER_NONE))
-        return gBattlePartners[trainerId - TRAINER_PARTNER(PARTNER_NONE)].trainerName;
-    return gTrainers[SanitizeTrainerId(trainerId)].trainerName;
+        return gBattlePartners[partnerDifficulty][trainerId - TRAINER_PARTNER(PARTNER_NONE)].trainerName;
+    return gTrainers[difficulty][sanitizedTrainerId].trainerName;
 }
 
 static inline const u8 GetTrainerPicFromId(u16 trainerId)
 {
-    return gTrainers[SanitizeTrainerId(trainerId)].trainerPic;
+    u32 sanitizedTrainerId = SanitizeTrainerId(trainerId);
+    u32 difficulty = GetTrainerDifficultyLevel(sanitizedTrainerId);
+
+    return gTrainers[difficulty][sanitizedTrainerId].trainerPic;
 }
 
 static inline const u8 GetTrainerStartingStatusFromId(u16 trainerId)
 {
-    return gTrainers[SanitizeTrainerId(trainerId)].startingStatus;
+    return gTrainers[GetCurrentDifficultyLevel()][SanitizeTrainerId(trainerId)].startingStatus;
 }
 
 static inline const bool32 IsTrainerDoubleBattle(u16 trainerId)
 {
-    return gTrainers[SanitizeTrainerId(trainerId)].doubleBattle;
+    u32 sanitizedTrainerId = SanitizeTrainerId(trainerId);
+    u32 difficulty = GetTrainerDifficultyLevel(sanitizedTrainerId);
+
+    return gTrainers[difficulty][sanitizedTrainerId].doubleBattle;
 }
 
 static inline const u8 GetTrainerPartySizeFromId(u16 trainerId)
 {
-    return gTrainers[SanitizeTrainerId(trainerId)].partySize;
+    u32 sanitizedTrainerId = SanitizeTrainerId(trainerId);
+    u32 difficulty = GetTrainerDifficultyLevel(sanitizedTrainerId);
+
+    return gTrainers[difficulty][sanitizedTrainerId].partySize;
 }
 
 static inline const bool32 DoesTrainerHaveMugshot(u16 trainerId)
 {
-    return gTrainers[SanitizeTrainerId(trainerId)].mugshotEnabled;
+    return gTrainers[GetCurrentDifficultyLevel()][SanitizeTrainerId(trainerId)].mugshotEnabled;
 }
 
 static inline const u8 GetTrainerMugshotColorFromId(u16 trainerId)
 {
-    return gTrainers[SanitizeTrainerId(trainerId)].mugshotColor;
+    return gTrainers[GetCurrentDifficultyLevel()][SanitizeTrainerId(trainerId)].mugshotColor;
 }
 
 static inline const u16 *GetTrainerItemsFromId(u16 trainerId)
 {
-    return gTrainers[SanitizeTrainerId(trainerId)].items;
+    u32 sanitizedTrainerId = SanitizeTrainerId(trainerId);
+    u32 difficulty = GetTrainerDifficultyLevel(sanitizedTrainerId);
+
+    return gTrainers[difficulty][sanitizedTrainerId].items;
 }
 
 static inline const struct TrainerMon *GetTrainerPartyFromId(u16 trainerId)
 {
-    return gTrainers[SanitizeTrainerId(trainerId)].party;
+    u32 sanitizedTrainerId = SanitizeTrainerId(trainerId);
+    u32 difficulty = GetTrainerDifficultyLevel(sanitizedTrainerId);
+
+    return gTrainers[difficulty][sanitizedTrainerId].party;
 }
 
 static inline const bool32 GetTrainerAIFlagsFromId(u16 trainerId)
 {
-    return gTrainers[SanitizeTrainerId(trainerId)].aiFlags;
+    u32 sanitizedTrainerId = SanitizeTrainerId(trainerId);
+    u32 difficulty = GetTrainerDifficultyLevel(sanitizedTrainerId);
+
+    return gTrainers[difficulty][sanitizedTrainerId].aiFlags;
 }
 
 #endif // GUARD_DATA_H

include/difficulty.h

@@ -0,0 +1,13 @@
+#ifndef GUARD_DIFFICULTY_H
+#define GUARD_DIFFICULTY_H
+
+#include "constants/difficulty.h"
+
+u32 GetCurrentDifficultyLevel(void);
+u32 GetBattlePartnerDifficultyLevel(u16);
+u32 GetTrainerDifficultyLevel(u16);
+void Script_IncreaseDifficulty(void);
+void Script_DecreaseDifficulty(void);
+void Script_SetDifficulty(u32);
+
+#endif // GUARD_DIFFICULTY_H

src/battle_controller_player_partner.c

@@ -297,9 +297,11 @@ static void PlayerPartnerHandleDrawTrainerPic(u32 battler)
     s16 xPos, yPos;
     u32 trainerPicId;
 
+    u32 difficulty = GetBattlePartnerDifficultyLevel(gPartnerTrainerId);
+
     if (gPartnerTrainerId > TRAINER_PARTNER(PARTNER_NONE))
     {
-        trainerPicId = gBattlePartners[gPartnerTrainerId - TRAINER_PARTNER(PARTNER_NONE)].trainerPic;
+        trainerPicId = gBattlePartners[difficulty][gPartnerTrainerId - TRAINER_PARTNER(PARTNER_NONE)].trainerPic;
         xPos = 90;
         yPos = (8 - gTrainerBacksprites[trainerPicId].coordinates.size) * 4 + 80;
     }
@@ -433,9 +435,10 @@ static void PlayerPartnerHandleHealthBarUpdate(u32 battler)
 static void PlayerPartnerHandleIntroTrainerBallThrow(u32 battler)
 {
     const u32 *trainerPal;
+    u32 difficulty = GetBattlePartnerDifficultyLevel(gPartnerTrainerId);
 
     if (gPartnerTrainerId > TRAINER_PARTNER(PARTNER_NONE))
-        trainerPal = gTrainerBacksprites[gBattlePartners[gPartnerTrainerId - TRAINER_PARTNER(PARTNER_NONE)].trainerPic].palette.data;
+        trainerPal = gTrainerBacksprites[gBattlePartners[difficulty][gPartnerTrainerId - TRAINER_PARTNER(PARTNER_NONE)].trainerPic].palette.data;
     else if (IsAiVsAiBattle())
         trainerPal = gTrainerSprites[GetTrainerPicFromId(gPartnerTrainerId)].palette.data;
     else