diff --git a/include/siirtc.h b/include/siirtc.h
index 5864f95b8..de4fd634d 100644
--- a/include/siirtc.h
+++ b/include/siirtc.h
@@ -39,10 +39,10 @@ struct SiiRtcInfo
     u8 alarmMinute;
 };
 
-void SiiRtcUnprotect();
-void SiiRtcProtect();
-u8 SiiRtcProbe();
-bool8 SiiRtcReset();
+void SiiRtcUnprotect(void);
+void SiiRtcProtect(void);
+u8 SiiRtcProbe(void);
+bool8 SiiRtcReset(void);
 bool8 SiiRtcGetStatus(struct SiiRtcInfo *rtc);
 bool8 SiiRtcSetStatus(struct SiiRtcInfo *rtc);
 bool8 SiiRtcGetDateTime(struct SiiRtcInfo *rtc);
diff --git a/src/battle_factory_screen.c b/src/battle_factory_screen.c
index 5cbe97702..85c0b2808 100644
--- a/src/battle_factory_screen.c
+++ b/src/battle_factory_screen.c
@@ -1741,7 +1741,7 @@ static void Select_CopyMonsToPlayerParty(void)
             {
                 gPlayerParty[i] = sFactorySelectScreen->mons[j].monData;
                 gSaveBlock2Ptr->frontier.rentalMons[i].monId = sFactorySelectScreen->mons[j].monSetId;
-                gSaveBlock2Ptr->frontier.rentalMons[i].personality = GetMonData(&gPlayerParty[i].box, MON_DATA_PERSONALITY, NULL);
+                gSaveBlock2Ptr->frontier.rentalMons[i].personality = GetMonData(&gPlayerParty[i], MON_DATA_PERSONALITY, NULL);
                 gSaveBlock2Ptr->frontier.rentalMons[i].abilityBit = GetBoxMonData(&gPlayerParty[i].box, MON_DATA_ALT_ABILITY, NULL);
                 gSaveBlock2Ptr->frontier.rentalMons[i].ivs = GetBoxMonData(&gPlayerParty[i].box, MON_DATA_ATK_IV, NULL);
                 break;
diff --git a/src/pokemon_storage_system.c b/src/pokemon_storage_system.c
index 9681b72f4..c5d40877b 100644
--- a/src/pokemon_storage_system.c
+++ b/src/pokemon_storage_system.c
@@ -6501,7 +6501,7 @@ static void InitCanRelaseMonVars(void)
     }
 
     sub_80CE350(sPSSData->field_2176);
-    sPSSData->field_2174 = GetMonData(&sPSSData->field_2108, MON_DATA_KNOWN_MOVES, sPSSData->field_2176);
+    sPSSData->field_2174 = GetMonData(&sPSSData->field_2108, MON_DATA_KNOWN_MOVES, (u8*)sPSSData->field_2176);
     if (sPSSData->field_2174 != 0)
     {
         sPSSData->field_216D = 0;
@@ -6559,7 +6559,7 @@ static s8 RunCanReleaseMon(void)
         {
             if (sPSSData->field_2170 != TOTAL_BOXES_COUNT || sPSSData->field_2171 != i)
             {
-                knownMoves = GetMonData(gPlayerParty + i, MON_DATA_KNOWN_MOVES, sPSSData->field_2176);
+                knownMoves = GetMonData(gPlayerParty + i, MON_DATA_KNOWN_MOVES, (u8*)sPSSData->field_2176);
                 sPSSData->field_2174 &= ~(knownMoves);
             }
         }
@@ -6578,7 +6578,7 @@ static s8 RunCanReleaseMon(void)
     case 1:
         for (i = 0; i < IN_BOX_COUNT; i++)
         {
-            knownMoves = GetAndCopyBoxMonDataAt(sPSSData->field_216E, sPSSData->field_216F, MON_DATA_KNOWN_MOVES, sPSSData->field_2176);
+            knownMoves = GetAndCopyBoxMonDataAt(sPSSData->field_216E, sPSSData->field_216F, MON_DATA_KNOWN_MOVES, (u8*)sPSSData->field_2176);
             if (knownMoves != 0
                 && !(sPSSData->field_2170 == sPSSData->field_216E && sPSSData->field_2171 == sPSSData->field_216F))
             {
@@ -10357,7 +10357,7 @@ bool32 AnyStorageMonWithMove(u16 moveId)
         {
             if (GetBoxMonData(&gPokemonStoragePtr->boxes[i][j], MON_DATA_SANITY_HAS_SPECIES)
                 && !GetBoxMonData(&gPokemonStoragePtr->boxes[i][j], MON_DATA_SANITY_IS_EGG)
-                && GetBoxMonData(&gPokemonStoragePtr->boxes[i][j], MON_DATA_KNOWN_MOVES, moves))
+                && GetBoxMonData(&gPokemonStoragePtr->boxes[i][j], MON_DATA_KNOWN_MOVES, (u8*)moves))
                 return TRUE;
         }
     }
diff --git a/src/pokemon_summary_screen.c b/src/pokemon_summary_screen.c
index 91e344123..0133e40f1 100644
--- a/src/pokemon_summary_screen.c
+++ b/src/pokemon_summary_screen.c
@@ -1349,7 +1349,7 @@ static bool8 ExtractMonDataToSummaryStruct(struct Pokemon *a)
         }
         break;
     case 3:
-        GetMonData(a, MON_DATA_OT_NAME, &sum->OTName);
+        GetMonData(a, MON_DATA_OT_NAME, sum->OTName);
         ConvertInternationalString((u8*)&sum->OTName, GetMonData(a, MON_DATA_LANGUAGE));
         sum->unk7 = sub_81B205C(a);
         sum->OTGender = GetMonData(a, MON_DATA_OT_GENDER);
diff --git a/src/siirtc.c b/src/siirtc.c
index f7e85ef4f..5c153a841 100644
--- a/src/siirtc.c
+++ b/src/siirtc.c
@@ -76,19 +76,19 @@ static void DisableGpioPortRead();
 
 static const char AgbLibRtcVersion[] = "SIIRTC_V001";
 
-void SiiRtcUnprotect()
+void SiiRtcUnprotect(void)
 {
     EnableGpioPortRead();
     sLocked = FALSE;
 }
 
-void SiiRtcProtect()
+void SiiRtcProtect(void)
 {
     DisableGpioPortRead();
     sLocked = TRUE;
 }
 
-u8 SiiRtcProbe()
+u8 SiiRtcProbe(void)
 {
     u8 errorCode;
     struct SiiRtcInfo rtc;
@@ -129,7 +129,7 @@ u8 SiiRtcProbe()
     return (errorCode << 4) | 1;
 }
 
-bool8 SiiRtcReset()
+bool8 SiiRtcReset(void)
 {
     u8 result;
     struct SiiRtcInfo rtc;