diff --git a/audio.asm b/audio.asm
index 16efad80..dce355bf 100644
--- a/audio.asm
+++ b/audio.asm
@@ -574,9 +574,10 @@ PlayBattleMusic:: ; 0x90c6
 	ld a, MUSIC_GYM_LEADER_BATTLE
 	jr .playSong
 .notGymLeaderBattle
+	ld a, [wIsTrainerBattle]
+	and a
+	jr z, .wildBattle
 	ld a, [W_CUROPPONENT]
-	cp $c8
-	jr c, .wildBattle
 	cp SONY3 + $c8
 	jr z, .finalBattle
 	cp LANCE + $c8
diff --git a/constants/sprite_constants.asm b/constants/sprite_constants.asm
index b3ae8e21..1ef2a976 100755
--- a/constants/sprite_constants.asm
+++ b/constants/sprite_constants.asm
@@ -88,10 +88,12 @@ SPRITE_LYING_OLD_MAN             EQU $48
 ITEM    EQU $80
 TRAINER EQU $40
 
+OW_POKEMON EQU $80
+
 BOULDER_MOVEMENT_BYTE_2 EQU $10
 
 ; sprite facing directions
 SPRITE_FACING_DOWN  EQU $00
 SPRITE_FACING_UP    EQU $04
 SPRITE_FACING_LEFT  EQU $08
-SPRITE_FACING_RIGHT EQU $0C
\ No newline at end of file
+SPRITE_FACING_RIGHT EQU $0C
diff --git a/constants/wram_constants.asm b/constants/wram_constants.asm
index e06ca2ce..500d3d2a 100644
--- a/constants/wram_constants.asm
+++ b/constants/wram_constants.asm
@@ -1,14 +1,3 @@
 
 SPRITEBUFFERSIZE EQU 7*7 * 8 ; 7 * 7 (tiles) * 8 (bytes per tile)
 
-; Overload W_GRASSMONS
-wd893 EQU $d893 ; W_GRASSMONS + 11
-wd896 EQU $d896 ;  W_GRASSMONS + 14
-
-; Overload enemy party data
-W_WATERRATE EQU $d8a4 ; wEnemyMon1Species
-W_WATERMONS EQU $d8a5 ; wEnemyMon1Species + 1
-
-; Overload enemy stat modifiers
-wTradeMonNick EQU $cd1e ; wPlayerMonAccuracyMod
-
diff --git a/data/mapObjects/powerplant.asm b/data/mapObjects/powerplant.asm
index 98e80ff9..31f74f4b 100755
--- a/data/mapObjects/powerplant.asm
+++ b/data/mapObjects/powerplant.asm
@@ -9,15 +9,15 @@ PowerPlantObject: ; 0x1e3bf (size=135)
 	db $0 ; signs
 
 	db $e ; people
-	db SPRITE_BALL, $14 + 4, $9 + 4, $ff, $ff, TRAINER | $1, VOLTORB, 40
-	db SPRITE_BALL, $12 + 4, $20 + 4, $ff, $ff, TRAINER | $2, VOLTORB, 40
-	db SPRITE_BALL, $19 + 4, $15 + 4, $ff, $ff, TRAINER | $3, VOLTORB, 40
-	db SPRITE_BALL, $12 + 4, $19 + 4, $ff, $ff, TRAINER | $4, ELECTRODE, 43
-	db SPRITE_BALL, $22 + 4, $17 + 4, $ff, $ff, TRAINER | $5, VOLTORB, 40
-	db SPRITE_BALL, $1c + 4, $1a + 4, $ff, $ff, TRAINER | $6, VOLTORB, 40
-	db SPRITE_BALL, $e + 4, $15 + 4, $ff, $ff, TRAINER | $7, ELECTRODE, 43
-	db SPRITE_BALL, $20 + 4, $25 + 4, $ff, $ff, TRAINER | $8, VOLTORB, 40
-	db SPRITE_BIRD, $9 + 4, $4 + 4, $ff, $d1, TRAINER | $9, ZAPDOS, 50
+	db SPRITE_BALL, $14 + 4, $9 + 4, $ff, $ff, TRAINER | $1, VOLTORB, 40 | OW_POKEMON
+	db SPRITE_BALL, $12 + 4, $20 + 4, $ff, $ff, TRAINER | $2, VOLTORB, 40 | OW_POKEMON
+	db SPRITE_BALL, $19 + 4, $15 + 4, $ff, $ff, TRAINER | $3, VOLTORB, 40 | OW_POKEMON
+	db SPRITE_BALL, $12 + 4, $19 + 4, $ff, $ff, TRAINER | $4, ELECTRODE, 43 | OW_POKEMON
+	db SPRITE_BALL, $22 + 4, $17 + 4, $ff, $ff, TRAINER | $5, VOLTORB, 40 | OW_POKEMON
+	db SPRITE_BALL, $1c + 4, $1a + 4, $ff, $ff, TRAINER | $6, VOLTORB, 40 | OW_POKEMON
+	db SPRITE_BALL, $e + 4, $15 + 4, $ff, $ff, TRAINER | $7, ELECTRODE, 43 | OW_POKEMON
+	db SPRITE_BALL, $20 + 4, $25 + 4, $ff, $ff, TRAINER | $8, VOLTORB, 40 | OW_POKEMON
+	db SPRITE_BIRD, $9 + 4, $4 + 4, $ff, $d1, TRAINER | $9, ZAPDOS, 50 | OW_POKEMON
 	db SPRITE_BALL, $19 + 4, $7 + 4, $ff, $ff, ITEM | $a, CARBOS
 	db SPRITE_BALL, $3 + 4, $1c + 4, $ff, $ff, ITEM | $b, HP_UP
 	db SPRITE_BALL, $3 + 4, $22 + 4, $ff, $ff, ITEM | $c, RARE_CANDY
diff --git a/data/mapObjects/seafoamislands5.asm b/data/mapObjects/seafoamislands5.asm
index 6c207975..cc1af811 100755
--- a/data/mapObjects/seafoamislands5.asm
+++ b/data/mapObjects/seafoamislands5.asm
@@ -14,7 +14,7 @@ SeafoamIslands5Object: ; 0x468bc (size=62)
 	db $3 ; people
 	db SPRITE_BOULDER, $f + 4, $4 + 4, $ff, $ff, $1 ; person
 	db SPRITE_BOULDER, $f + 4, $5 + 4, $ff, $ff, $2 ; person
-	db SPRITE_BIRD, $1 + 4, $6 + 4, $ff, $d0, TRAINER | $3, ARTICUNO, 50
+	db SPRITE_BIRD, $1 + 4, $6 + 4, $ff, $d0, TRAINER | $3, ARTICUNO, 50 | OW_POKEMON
 
 	; warp-to
 	EVENT_DISP SEAFOAM_ISLANDS_5_WIDTH, $11, $14 ; SEAFOAM_ISLANDS_4
diff --git a/data/mapObjects/unknowndungeon3.asm b/data/mapObjects/unknowndungeon3.asm
index a3fba264..9b486b39 100755
--- a/data/mapObjects/unknowndungeon3.asm
+++ b/data/mapObjects/unknowndungeon3.asm
@@ -7,7 +7,7 @@ UnknownDungeon3Object: ; 0x45f36 (size=34)
 	db $0 ; signs
 
 	db $3 ; people
-	db SPRITE_SLOWBRO, $d + 4, $1b + 4, $ff, $d0, TRAINER | $1, MEWTWO, 70
+	db SPRITE_SLOWBRO, $d + 4, $1b + 4, $ff, $d0, TRAINER | $1, MEWTWO, 70 | OW_POKEMON
 	db SPRITE_BALL, $9 + 4, $10 + 4, $ff, $ff, ITEM | $2, ULTRA_BALL
 	db SPRITE_BALL, $1 + 4, $12 + 4, $ff, $ff, ITEM | $3, MAX_REVIVE
 
diff --git a/data/mapObjects/victoryroad2.asm b/data/mapObjects/victoryroad2.asm
index 39ec23c5..a2bf713e 100755
--- a/data/mapObjects/victoryroad2.asm
+++ b/data/mapObjects/victoryroad2.asm
@@ -18,7 +18,7 @@ VictoryRoad2Object: ; 0x51915 (size=154)
 	db SPRITE_BLACK_HAIR_BOY_1, $8 + 4, $13 + 4, $ff, $d0, TRAINER | $3, TAMER + $C8, $5
 	db SPRITE_BLACK_HAIR_BOY_2, $2 + 4, $4 + 4, $ff, $d0, TRAINER | $4, POKEMANIAC + $C8, $6
 	db SPRITE_BLACK_HAIR_BOY_2, $3 + 4, $1a + 4, $ff, $d2, TRAINER | $5, JUGGLER + $C8, $5
-	db SPRITE_BIRD, $5 + 4, $b + 4, $ff, $d1, TRAINER | $6, MOLTRES, 50
+	db SPRITE_BIRD, $5 + 4, $b + 4, $ff, $d1, TRAINER | $6, MOLTRES, 50 | OW_POKEMON
 	db SPRITE_BALL, $5 + 4, $1b + 4, $ff, $ff, ITEM | $7, TM_17
 	db SPRITE_BALL, $9 + 4, $12 + 4, $ff, $ff, ITEM | $8, FULL_HEAL
 	db SPRITE_BALL, $b + 4, $9 + 4, $ff, $ff, ITEM | $9, TM_05
diff --git a/data/pokedex_entries.asm b/data/pokedex_entries.asm
index 9b9f0ace..6543b36e 100755
--- a/data/pokedex_entries.asm
+++ b/data/pokedex_entries.asm
@@ -1319,6 +1319,8 @@ VictreebelDexEntry: ; 40fd1 (10:4fd1)
 
 MissingNoDexEntry: ; 40fe5 (10:4fe5)
 	db "???@"
-	db 10 ; 1.0 m
-	db 100 ; 10.0 kg
-	db 0,"コメント さくせいちゅう@" ; コメント作成中 (Comment to be written)
+	db 0, 0
+	dw 0000
+	text "No entry"
+	dex
+	db "@"
diff --git a/engine/battle/1c.asm b/engine/battle/1c.asm
index bceeac2b..b5bc1261 100755
--- a/engine/battle/1c.asm
+++ b/engine/battle/1c.asm
@@ -159,9 +159,9 @@ BattleTransitions: ; 709d2 (1c:49d2)
 	dw BattleTransition_Split             ; %111
 
 GetBattleTransitionID_WildOrTrainer: ; 709e2 (1c:49e2)
-	ld a, [W_CUROPPONENT]
-	cp $c8
-	jr nc, .trainer
+	ld a, [wIsTrainerBattle]
+	and a
+	jr nz, .trainer
 	res 0, c
 	ret
 .trainer
diff --git a/engine/battle/core.asm b/engine/battle/core.asm
index 1cf56cf4..9d4a596b 100755
--- a/engine/battle/core.asm
+++ b/engine/battle/core.asm
@@ -1021,6 +1021,8 @@ TrainerBattleVictory: ; 3c696 (f:4696)
 	ld de, wPlayerMoney + 2
 	ld hl, wd07b
 	ld c, $3
+    xor a
+    ld [wIsTrainerBattle], a
 	predef_jump AddBCDPredef
 
 MoneyForWinningText: ; 3c6e4 (f:46e4)
@@ -1198,6 +1200,8 @@ ChooseNextMon: ; 3c7d8 (f:47d8)
 ; called when player is out of usable mons.
 ; prints approriate lose message, sets carry flag if player blacked out (special case for initial rival fight)
 HandlePlayerBlackOut: ; 3c837 (f:4837)
+	xor a
+	ld [wIsTrainerBattle], a
 	ld a, [W_ISLINKBATTLE]
 	cp $4
 	jr z, .notSony1Battle
@@ -6769,9 +6773,11 @@ asm_3ef3d: ; 3ef3d (f:6f3d)
 	push af
 	res 1, [hl]
 	callab Func_525af
-	ld a, [wEnemyMonSpecies2]
-	sub $c8
-	jp c, InitWildBattle
+	ld a, [wIsTrainerBattle]
+	and a
+	jp z, InitWildBattle
+    ld a, [wEnemyMonSpecies2]
+    sub $c8
 	ld [W_TRAINERCLASS], a
 	call GetTrainerInformation
 	callab ReadTrainer
diff --git a/engine/menu/debug_menu.asm b/engine/menu/debug_menu.asm
index a1e6a842..1e427ae3 100644
--- a/engine/menu/debug_menu.asm
+++ b/engine/menu/debug_menu.asm
@@ -22,6 +22,14 @@ DebugMenu:
 	call PrintDebugMenuItem
 	ld de,DebugMenuItem2
 	call PrintDebugMenuItem
+	ld de,DebugMenuItem3
+	call PrintDebugMenuItem
+	ld de,DebugMenuItem4
+	call PrintDebugMenuItem
+	ld de,DebugMenuItem5
+	call PrintDebugMenuItem
+	ld de,DebugMenuItem6
+	call PrintDebugMenuItem
 	ld hl,wd730
 	res 6,[hl] ; turn pauses between printing letters back on
 	
@@ -73,6 +81,12 @@ DebugMenu:
 	
 	cp a, 1
 	jp z, DebugMenuFly
+	
+	cp a, 2
+	jp z, DebugMenu251
+	
+	cp a, 3
+	jp z, DebugMenuMasterB
 
 CloseDebugMenu:: 
     ret
@@ -91,12 +105,13 @@ PrintDebugMenuItem: ; 71bb (1:71bb)
 	add hl,de
 	ret
 
-DebugMenuItem0:
-    db "WTW@"
-DebugMenuItem1:
-    db "FLY@"
-DebugMenuItem2:
-    db "LV.100@"
+DebugMenuItem0: db "WTW@"
+DebugMenuItem1: db "FLY@"
+DebugMenuItem2: db "Wild 251@"
+DebugMenuItem3: db "MasterB@"
+DebugMenuItem4: db "-@"
+DebugMenuItem5: db "-@"
+DebugMenuItem6: db "-@"
 
 DebugMenuWTW:
     ld a, 1
@@ -110,3 +125,24 @@ DebugMenuFly:
     ld [hl], a
     call ChooseFlyDestination
     ret
+
+DebugMenu251:
+    ld hl, wd72d
+    res 4, [hl]
+    ld hl, wd72e
+    res 4, [hl]
+    ld a, 251
+    ld [W_CUROPPONENT], a
+    ld a, 5
+    ld [W_CURENEMYLVL], a
+    ret
+
+DebugMenuMasterB:
+    ld hl, wNumBagItems
+    inc [hl]
+    inc hl
+    ld a, 1
+    ld [hli], a
+    ld a, 99
+    ld [hl], a
+    ret
diff --git a/home.asm b/home.asm
index d501380f..1d40c9ab 100644
--- a/home.asm
+++ b/home.asm
@@ -2381,9 +2381,8 @@ EndTrainerBattle:: ; 3275 (0:3275)
 	ld c, a
 	ld b, $1
 	call TrainerFlagAction   ; flag trainer as fought
-	ld a, [W_ENEMYMONORTRAINERCLASS]
-	cp $c8
-	jr nc, .skipRemoveSprite    ; test if trainer was fought (in that case skip removing the corresponding sprite)
+	ld a, [wIsTrainerBattle]
+	jr nz, .skipRemoveSprite    ; test if trainer was fought (in that case skip removing the corresponding sprite)
 	ld hl, W_MISSABLEOBJECTLIST
 	ld de, $2
 	ld a, [wSpriteIndex]
@@ -2393,6 +2392,8 @@ EndTrainerBattle:: ; 3275 (0:3275)
 	ld [wcc4d], a               ; load corresponding missable object index and remove it
 	predef HideObject
 .skipRemoveSprite
+    xor a
+    ld [wIsTrainerBattle], a
 	ld hl, wd730
 	bit 4, [hl]
 	res 4, [hl]
@@ -2418,9 +2419,10 @@ InitBattleEnemyParameters:: ; 32d7 (0:32d7)
 	ld a, [wEngagedTrainerClass]
 	ld [W_CUROPPONENT], a ; wd059
 	ld [W_ENEMYMONORTRAINERCLASS], a
-	cp $c8
+	ld a, [wIsTrainerBattle]
+	and a
+	jr z, .noTrainer
 	ld a, [wEngagedTrainerSet] ; wcd2e
-	jr c, .noTrainer
 	ld [W_TRAINERNO], a ; wd05d
 	ret
 .noTrainer
@@ -2519,6 +2521,14 @@ EngageMapTrainer:: ; 336a (0:336a)
 	ld a, [hli]    ; load trainer class
 	ld [wEngagedTrainerClass], a
 	ld a, [hl]     ; load trainer mon set
+	bit 7, a
+	jr nz, .pokemon
+	ld [wEnemyMonAttackMod], a ; wcd2e
+	ld a, 1
+	ld [wIsTrainerBattle], a
+	jp PlayTrainerMusic
+.pokemon
+	and $7F
 	ld [wEnemyMonAttackMod], a ; wcd2e
 	jp PlayTrainerMusic
 
diff --git a/wram.asm b/wram.asm
index e7464a3c..7604b6ba 100755
--- a/wram.asm
+++ b/wram.asm
@@ -120,10 +120,11 @@ wc0ee:: ds 1
 wc0ef:: ds 1
 wc0f0:: ds 1
 wc0f1:: ds 1
-wc0f2:: ds 12 ;14
+wc0f2:: ds 11 ;14
 
 wHaltAudio:: ds 1
 wSFXDontWait:: ds 1
+wIsTrainerBattle:: ds 1
 
 SECTION "Sprite State Data", WRAM0[$c100]
 
@@ -2031,6 +2032,16 @@ W_GRASSRATE:: ; d887
 W_GRASSMONS:: ; d888
 	ds 20
 
+; Overload W_GRASSMONS
+wd893:: ds 3
+wd896:: ds 3
+
+; Overload enemy party data
+W_WATERRATE:: ds 1
+W_WATERMONS:: ds 20
+
+; Overload enemy stat modifiers
+wTradeMonNick:: ds 11
 
 wEnemyPartyCount:: ds 1     ; d89c
 wEnemyPartyMons::  ds PARTY_LENGTH + 1 ; d89d
@@ -2099,21 +2110,7 @@ wBoxMonOT::    ds 11 * MONS_PER_BOX ; dd2a
 wBoxMonNicks:: ds 11 * MONS_PER_BOX ; de06
 wBoxMonNicksEnd:: ; dee2
 
-SECTION "Splash", WRAMX, BANK[1]
-wVWFLetterNum:: ds 1
-wVWFChar:: ds 1
-wVWFTileLoc:: ds 2
-wVWFFirstTileNum:: ds 1
-wVWFCurTileNum:: ds 1
-wVWFCurTileCol:: ds 1
-wVWFNumTilesUsed:: ds 1
-wVWFCharWidth:: ds 1
-
-wVWFBuildArea0:: ds 8
-wVWFBuildArea1:: ds 8
-wVWFBuildArea2:: ds 8
-wVWFBuildArea3:: ds 8
-wVWFCopyArea:: ds $10
+SECTION "Empty", WRAMX, BANK[1]
 
 
 SECTION "Stack", WRAMX[$dfff], BANK[1]