diff --git a/data/fldeff_flash.s b/data/fldeff_flash.s
deleted file mode 100644
index 3c3071b37..000000000
--- a/data/fldeff_flash.s
+++ /dev/null
@@ -1,81 +0,0 @@
-	.include "asm/macros.inc"
-	.include "constants/constants.inc"
-
-	.section .rodata
-
-	.align 2
-gUnknown_085B27C8:: @ 85B27C8
-	.byte 0x01, 0x04, 0x01, 0x00
-	.4byte sub_81375A8
-
-	.byte 0x02, 0x04, 0x01, 0x00
-	.4byte sub_81375A8
-
-	.byte 0x03, 0x04, 0x01, 0x00
-	.4byte sub_81375A8
-
-	.byte 0x05, 0x04, 0x01, 0x00
-	.4byte sub_81375A8
-
-	.byte 0x06, 0x04, 0x01, 0x00
-	.4byte sub_81375A8
-
-	.byte 0x07, 0x04, 0x01, 0x00
-	.4byte sub_81375A8
-
-	.byte 0x08, 0x04, 0x01, 0x00
-	.4byte sub_81375A8
-
-	.byte 0x09, 0x04, 0x01, 0x00
-	.4byte sub_81375A8
-
-	.byte 0x04, 0x01, 0x00, 0x01
-	.4byte sub_81373F0
-
-	.byte 0x04, 0x02, 0x00, 0x01
-	.4byte sub_81373F0
-
-	.byte 0x04, 0x03, 0x00, 0x01
-	.4byte sub_81373F0
-
-	.byte 0x04, 0x05, 0x00, 0x01
-	.4byte sub_81373F0
-
-	.byte 0x04, 0x06, 0x00, 0x01
-	.4byte sub_81373F0
-
-	.byte 0x04, 0x07, 0x00, 0x01
-	.4byte sub_81373F0
-
-	.byte 0x04, 0x08, 0x00, 0x01
-	.4byte sub_81373F0
-
-	.byte 0x04, 0x09, 0x00, 0x01
-	.4byte sub_81373F0
-
-	.byte 0x00, 0x00, 0x00, 0x00
-	.4byte NULL
-
-	.align 2
-gCaveTransitionPalette_White:: @ 85B2850
-	.incbin "graphics/misc/cave_transition_white.gbapal"
-
-	.align 2
-gCaveTransitionPalette_Black:: @ 85B2870
-	.incbin "graphics/misc/cave_transition_black.gbapal"
-
-	.align 2
-gUnknown_085B2890:: @ 85B2890
-	.incbin "graphics/misc/85B2890.gbapal"
-
-	.align 2
-gUnknown_085B28A0:: @ 85B28A0
-	.incbin "graphics/misc/85B28A0.gbapal"
-
-	.align 2
-gCaveTransitionTilemap:: @ 85B28B0
-	.incbin "graphics/misc/cave_transition_map.bin.lz"
-
-	.align 2
-gCaveTransitionTiles:: @ 85B2A90
-	.incbin "graphics/misc/cave_transition.4bpp.lz"
diff --git a/include/braille_puzzles.h b/include/braille_puzzles.h
new file mode 100644
index 000000000..780abeeba
--- /dev/null
+++ b/include/braille_puzzles.h
@@ -0,0 +1,7 @@
+#ifndef GUARD_BRAILLE_PUZZLES_H
+#define GUARD_BRAILLE_PUZZLES_H
+
+bool8 ShouldDoBrailleFlyEffect(void);
+void sub_8179918(void);
+
+#endif // GUARD_BRAILLE_PUZZLES_H
diff --git a/include/event_scripts.h b/include/event_scripts.h
index a835782ed..4c5dfd544 100644
--- a/include/event_scripts.h
+++ b/include/event_scripts.h
@@ -22,6 +22,7 @@ extern const u8 EventScript_2713D1[];
 extern const u8 EventScript_2766A2[];
 extern const u8 EventScript_2766A6[];
 
+
 extern const u8 gTVBravoTrainerText00[];
 extern const u8 gTVBravoTrainerText01[];
 extern const u8 gTVBravoTrainerText02[];
@@ -381,6 +382,9 @@ extern const u8 SecretBase_RedCave1_Text_2751E1[];
 extern const u8 SecretBase_RedCave1_Text_2754F6[];
 extern const u8 SecretBase_RedCave1_Text_2758CC[];
 
+//field effects
 extern const u8 FieryPath_EventScript_2908FD[];
 extern const u8 EventScript_290CAE[];
+extern const u8 EventScript_2926F8[];
+
 #endif //GUARD_EVENT_SCRIPTS_H
diff --git a/include/roulette_util.h b/include/roulette_util.h
new file mode 100644
index 000000000..f59c4e44c
--- /dev/null
+++ b/include/roulette_util.h
@@ -0,0 +1,17 @@
+#ifndef GUARD_ROULETTE_UTIL_H
+#define GUARD_ROULETTE_UTIL_H
+
+// structures
+struct InnerStruct203CF18
+{
+    u8 filler[0xC4];
+};
+
+void sub_8151B68(struct InnerStruct203CF18 *, const u8*);
+void sub_8151B3C(struct InnerStruct203CF18 *);
+void sub_8151CA8(struct InnerStruct203CF18 *, u8, u8);
+void sub_8151C50(struct InnerStruct203CF18 *, u8, u8);
+void sub_8151D28(struct InnerStruct203CF18 *, u8, u8);
+void sub_8151E50(struct InnerStruct203CF18 *);
+
+#endif // GUARD_ROULETTE_UTIL_H
diff --git a/ld_script.txt b/ld_script.txt
index 5f027d303..4b2b4ee3a 100644
--- a/ld_script.txt
+++ b/ld_script.txt
@@ -470,7 +470,7 @@ SECTIONS {
         data/starter_choose.o(.rodata);
         src/wallclock.o(.rodata);
         src/pokeblock.o(.rodata);
-        data/fldeff_flash.o(.rodata);
+        src/fldeff_flash.o(.rodata);
         src/time_events.o(.rodata);
         data/field_specials.o(.rodata);
         data/battle_records.o(.rodata);
diff --git a/src/fldeff_flash.c b/src/fldeff_flash.c
index 6a3a1a963..f31fe2b47 100644
--- a/src/fldeff_flash.c
+++ b/src/fldeff_flash.c
@@ -1,5 +1,6 @@
 #include "global.h"
 #include "constants/songs.h"
+#include "braille_puzzles.h"
 #include "event_data.h"
 #include "event_scripts.h"
 #include "field_effect.h"
@@ -25,42 +26,53 @@ struct FlashStruct
     void (*func)(void);
 };
 
-// extern data
-extern u8 EventScript_2926F8[];
-
-// extern functions
-extern bool8 ShouldDoBrailleFlyEffect(void);
-extern void sub_8179918(void);
-
 // static functions
-void hm2_flash(void);
-void sub_81371B4(void);
-bool8 sub_8137304(void);
-void sub_8137404(u8 taskId);
-void sub_8137420(u8 taskId);
-void sub_81374C4(u8 taskId);
-void sub_813750C(u8 taskId);
-void sub_8137574(u8 taskId);
-void sub_81375BC(u8 taskId);
-void sub_81375D8(u8 taskId);
-void sub_8137678(u8 taskId);
-void sub_81376DC(u8 taskId);
+static void hm2_flash(void);
+static void sub_81371B4(void);
+static bool8 sub_8137304(void);
+static void sub_81373F0(void);
+static void sub_8137404(u8 taskId);
+static void sub_8137420(u8 taskId);
+static void sub_81374C4(u8 taskId);
+static void sub_813750C(u8 taskId);
+static void sub_8137574(u8 taskId);
+static void sub_81375A8(void);
+static void sub_81375BC(u8 taskId);
+static void sub_81375D8(u8 taskId);
+static void sub_8137678(u8 taskId);
+static void sub_81376DC(u8 taskId);
 
 // rodata
-extern struct FlashStruct gUnknown_085B27C8[];
+static const struct FlashStruct gUnknown_085B27C8[] =
+{
+    {1, 4, 1, 0, sub_81375A8},
+    {2, 4, 1, 0, sub_81375A8},
+    {3, 4, 1, 0, sub_81375A8},
+    {5, 4, 1, 0, sub_81375A8},
+    {6, 4, 1, 0, sub_81375A8},
+    {7, 4, 1, 0, sub_81375A8},
+    {8, 4, 1, 0, sub_81375A8},
+    {9, 4, 1, 0, sub_81375A8},
+    {4, 1, 0, 1, sub_81373F0},
+    {4, 2, 0, 1, sub_81373F0},
+    {4, 3, 0, 1, sub_81373F0},
+    {4, 5, 0, 1, sub_81373F0},
+    {4, 6, 0, 1, sub_81373F0},
+    {4, 7, 0, 1, sub_81373F0},
+    {4, 8, 0, 1, sub_81373F0},
+    {4, 9, 0, 1, sub_81373F0},
+    {0, 0, 0, 0, NULL},
+};
 
-/*static const*/ extern u16 gCaveTransitionPalette_White[];// = {0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF};
-/*static const*/ extern u16 gCaveTransitionPalette_Black[];// = {0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000};
+static const u16 gCaveTransitionPalette_White[] = INCBIN_U16("graphics/misc/cave_transition_white.gbapal");
+static const u16 gCaveTransitionPalette_Black[] = INCBIN_U16("graphics/misc/cave_transition_black.gbapal");
 
-/*static const*/ extern u16 gUnknown_085B2890[];// = INCBIN_U16("graphics/misc/83F808C.gbapal");
-/*static const*/ extern u16 gUnknown_085B28A0[];// = INCBIN_U16("graphics/misc/83F809C.gbapal");
-/*static const*/ extern u16 gCaveTransitionTilemap[];// = INCBIN_U16("graphics/misc/cave_transition_map.bin.lz");
-/*static const*/ extern u8 gCaveTransitionTiles[];// = INCBIN_U8("graphics/misc/cave_transition.4bpp.lz");
-
-// ewram
+static const u16 gUnknown_085B2890[] = INCBIN_U16("graphics/misc/85B2890.gbapal");
+static const u16 gUnknown_085B28A0[] = INCBIN_U16("graphics/misc/85B28A0.gbapal");
+static const u16 gCaveTransitionTilemap[] = INCBIN_U16("graphics/misc/cave_transition_map.bin.lz");
+static const u8 gCaveTransitionTiles[] = INCBIN_U8("graphics/misc/cave_transition.4bpp.lz");
 
 // text
-
 bool8 SetUpFieldMove_Flash(void)
 {
     if(ShouldDoBrailleFlyEffect())
@@ -80,7 +92,7 @@ bool8 SetUpFieldMove_Flash(void)
     return FALSE;
 }
 
-void hm2_flash(void)
+static void hm2_flash(void)
 {
     u8 taskId = oei_task_add();
     gFieldEffectArguments[0] = GetCursorSelectionMonId();
@@ -88,14 +100,14 @@ void hm2_flash(void)
     gTasks[taskId].data[9] = (uintptr_t)sub_81371B4;
 }
 
-void sub_81371B4(void)
+static void sub_81371B4(void)
 {
     PlaySE(SE_W115);
     FlagSet(FLAG_SYS_USE_FLASH);
     ScriptContext1_SetupScript(EventScript_2926F8);
 }
 
-void sub_81371D4(void)
+static void sub_81371D4(void)
 {
     RunTasks();
     AnimateSprites();
@@ -103,7 +115,7 @@ void sub_81371D4(void)
     UpdatePaletteFade();
 }
 
-void sub_81371EC(void)
+static void sub_81371EC(void)
 {
     LoadOam();
     ProcessSpriteCopyRequests();
@@ -141,7 +153,7 @@ void c2_change_map(void)
         SetMainCallback2(gMain.savedCallback);
 }
 
-bool8 sub_8137304(void)
+static bool8 sub_8137304(void)
 {
     u8 i;
     u8 v0 = get_map_light_from_warp0();
@@ -193,17 +205,17 @@ bool8 fade_type_for_given_maplight_pair(u8 a1, u8 a2)
     return FALSE;
 }
 
-void sub_81373F0(void)
+static void sub_81373F0(void)
 {
     CreateTask(sub_8137404, 0);
 }
 
-void sub_8137404(u8 taskId)
+static void sub_8137404(u8 taskId)
 {
     gTasks[taskId].func = sub_8137420;
 }
 
-void sub_8137420(u8 taskId)
+static void sub_8137420(u8 taskId)
 {
     SetGpuReg(REG_OFFSET_DISPCNT, 0);
     LZ77UnCompVram(gCaveTransitionTiles, (void *)0x600C000);
@@ -233,7 +245,7 @@ void sub_8137420(u8 taskId)
     gTasks[taskId].data[1] = 0;
 }
 
-void sub_81374C4(u8 taskId)
+static void sub_81374C4(u8 taskId)
 {
     u16 count = gTasks[taskId].data[1];
     u16 blend = count + 0x1000;
@@ -250,11 +262,11 @@ void sub_81374C4(u8 taskId)
     }
 }
 
-void sub_813750C(u8 taskId)
+static void sub_813750C(u8 taskId)
 {
     u16 count;
 
-    SetGpuReg(REG_OFFSET_BLDALPHA, 4112);
+    SetGpuReg(REG_OFFSET_BLDALPHA, BLDALPHA_BLEND(16, 16));
     count = gTasks[taskId].data[2];
 
     if (count < 8)
@@ -270,7 +282,7 @@ void sub_813750C(u8 taskId)
     }
 }
 
-void sub_8137574(u8 taskId)
+static void sub_8137574(u8 taskId)
 {
     if (gTasks[taskId].data[2])
         gTasks[taskId].data[2]--;
@@ -278,17 +290,17 @@ void sub_8137574(u8 taskId)
         SetMainCallback2(gMain.savedCallback);
 }
 
-void sub_81375A8(void)
+static void sub_81375A8(void)
 {
     CreateTask(sub_81375BC, 0);
 }
 
-void sub_81375BC(u8 taskId)
+static void sub_81375BC(u8 taskId)
 {
     gTasks[taskId].func = sub_81375D8;
 }
 
-void sub_81375D8(u8 taskId)
+static void sub_81375D8(u8 taskId)
 {
     SetGpuReg(REG_OFFSET_DISPCNT, 0);
     LZ77UnCompVram(gCaveTransitionTiles, (void *)0x600C000);
@@ -313,7 +325,7 @@ void sub_81375D8(u8 taskId)
     gTasks[taskId].data[2] = 0;
 }
 
-void sub_8137678(u8 taskId)
+static void sub_8137678(u8 taskId)
 {
     u16 count = gTasks[taskId].data[2];
 
@@ -337,7 +349,7 @@ void sub_8137678(u8 taskId)
     }
 }
 
-void sub_81376DC(u8 taskId)
+static void sub_81376DC(u8 taskId)
 {
     u16 count = 16 - gTasks[taskId].data[1];
     u16 blend = count + 0x1000;
diff --git a/src/fldeff_groundshake.c b/src/fldeff_groundshake.c
index e16b01b6e..bee4d2c4b 100644
--- a/src/fldeff_groundshake.c
+++ b/src/fldeff_groundshake.c
@@ -7,17 +7,13 @@
 #include "field_map_obj.h"
 #include "malloc.h"
 #include "random.h"
+#include "roulette_util.h"
 #include "script.h"
 #include "sound.h"
 #include "sprite.h"
 #include "task.h"
 
 // structures
-struct InnerStruct203CF18
-{
-    u8 filler[0xC4];
-};
-
 struct Struct203CF18 {
     u8 taskId;
     struct InnerStruct203CF18 unk4;
@@ -27,14 +23,6 @@ struct Struct203CF18 {
 extern const struct SpriteSheet gUnknown_08617D94[];
 extern const s16 gUnknown_08617D64[][3];
 
-// extern functions
-extern void sub_8151B68(struct InnerStruct203CF18 *, const u8*);
-extern void sub_8151B3C(struct InnerStruct203CF18 *);
-extern void sub_8151CA8(struct InnerStruct203CF18 *, u8, u8);
-extern void sub_8151C50(struct InnerStruct203CF18 *, u8, u8);
-extern void sub_8151D28(struct InnerStruct203CF18 *, u8, u8);
-extern void sub_8151E50(struct InnerStruct203CF18 *);
-
 // static functions
 static void sub_81BE808(u8 taskId);
 static void sub_81BE900(u8 taskId);
diff --git a/src/fldeff_softboiled.c b/src/fldeff_softboiled.c
index b61cf9f32..d0a40a9a9 100644
--- a/src/fldeff_softboiled.c
+++ b/src/fldeff_softboiled.c
@@ -9,10 +9,10 @@
 #include "strings.h"
 #include "task.h"
 
-void sub_816166C(u8 taskId);
-void sub_81617B8(u8 taskId);
-void sub_81616C0(u8 taskId);
-void sub_8161724(u8 taskId);
+static void sub_816166C(u8 taskId);
+static void sub_81616C0(u8 taskId);
+static void sub_8161724(u8 taskId);
+static void sub_81617B8(u8 taskId);
 
 bool8 SetUpFieldMove_SoftBoiled(void)
 {
@@ -63,13 +63,13 @@ void sub_81615A8(u8 taskId)
     sub_81B1F18(taskId, unk9, -1, GetMonData(&gPlayerParty[unk9], MON_DATA_MAX_HP)/5, sub_816166C);
 }
 
-void sub_816166C(u8 taskId)
+static void sub_816166C(u8 taskId)
 {
     PlaySE(SE_KAIFUKU);
     sub_81B1F18(taskId, gUnknown_0203CEC8.unkA, 1, GetMonData(&gPlayerParty[gUnknown_0203CEC8.unk9], MON_DATA_MAX_HP)/5, sub_81616C0);
 }
 
-void sub_81616C0(u8 taskId)
+static void sub_81616C0(u8 taskId)
 {
     GetMonNickname(&gPlayerParty[gUnknown_0203CEC8.unkA], gStringVar1);
     StringExpandPlaceholders(gStringVar4, gText_PkmnHPRestoredByVar2);
@@ -78,7 +78,7 @@ void sub_81616C0(u8 taskId)
     gTasks[taskId].func = sub_8161724;
 }
 
-void sub_8161724(u8 taskId)
+static void sub_8161724(u8 taskId)
 {
     if(sub_81B1BD4() == 1)
         return;
@@ -92,7 +92,7 @@ void sub_8161724(u8 taskId)
     gTasks[taskId].func = sub_81B1370;
 }
 
-void sub_8161784(u8 taskId)
+static void sub_8161784(u8 taskId)
 {
     if(sub_81B1BD4() == 1)
         return;
@@ -100,7 +100,7 @@ void sub_8161784(u8 taskId)
     gTasks[taskId].func = sub_81B1370;
 }
 
-void sub_81617B8(u8 taskId)
+static void sub_81617B8(u8 taskId)
 {
     PlaySE(SE_SELECT);
     sub_81B1B5C(&gText_CantBeUsedOnPkmn, 0);
diff --git a/src/fldeff_strength.c b/src/fldeff_strength.c
index c1965d983..162479c73 100644
--- a/src/fldeff_strength.c
+++ b/src/fldeff_strength.c
@@ -7,9 +7,11 @@
 #include "script.h"
 #include "task.h"
 
-void FldEff_UseStrength(void);
-void sub_8145E74(void);
+// static functions
+static void FldEff_UseStrength(void);
+static void sub_8145E74(void);
 
+// text
 bool8 SetUpFieldMove_Strength(void)
 {
     if (npc_before_player_of_type(87) == TRUE)
@@ -22,7 +24,7 @@ bool8 SetUpFieldMove_Strength(void)
     return FALSE;
 }
 
-void FldEff_UseStrength(void)
+static void FldEff_UseStrength(void)
 {
     gFieldEffectArguments[0] = GetCursorSelectionMonId();
     ScriptContext1_SetupScript(FieryPath_EventScript_2908FD);
@@ -37,7 +39,7 @@ bool8 sub_8145E2C(void)
     return FALSE;
 }
 
-void sub_8145E74(void)
+static void sub_8145E74(void)
 {
     FieldEffectActiveListRemove(FLDEFF_USE_STRENGTH);
     EnableBothScriptContexts();