diff --git a/data/events/trades.asm b/data/events/trades.asm
index 8734d1d4b..ea5554f60 100644
--- a/data/events/trades.asm
+++ b/data/events/trades.asm
@@ -15,14 +15,14 @@ TradeMons:
 	; Red/Blue uses the original JP Red/Green trades but with the JP Blue
 	; post-trade text. English Yellow changed _AfterTrade2Text to
 	; not mention evolution.
-	npctrade NIDORINO,   NIDORINA,  TRADE_DIALOGSET_CASUAL,    "TERRY"
-	npctrade ABRA,       MR_MIME,   TRADE_DIALOGSET_CASUAL,    "MARCEL"
-	npctrade BUTTERFREE, BEEDRILL,  TRADE_DIALOGSET_HAPPY,     "CHIKUCHIKU" ; unused
-	npctrade PONYTA,     SEEL,      TRADE_DIALOGSET_CASUAL,    "SAILOR"
-	npctrade SPEAROW,    FARFETCHD, TRADE_DIALOGSET_HAPPY,     "DUX"
-	npctrade SLOWBRO,    LICKITUNG, TRADE_DIALOGSET_CASUAL,    "MARC"
-	npctrade POLIWHIRL,  JYNX,      TRADE_DIALOGSET_EVOLUTION, "LOLA"
-	npctrade RAICHU,     ELECTRODE, TRADE_DIALOGSET_EVOLUTION, "DORIS"
-	npctrade VENONAT,    TANGELA,   TRADE_DIALOGSET_HAPPY,     "CRINKLES"
-	npctrade NIDORAN_M,  NIDORAN_F, TRADE_DIALOGSET_HAPPY,     "SPOT"
+	npctrade NIDORINO,   NIDORINA,  TRADE_DIALOGSET_CASUAL,    "TERRY"      ; ROUTE_11_GATE_2F
+	npctrade ABRA,       MR_MIME,   TRADE_DIALOGSET_CASUAL,    "MARCEL"     ; ROUTE_2_TRADE_HOUSE
+	npctrade BUTTERFREE, BEEDRILL,  TRADE_DIALOGSET_HAPPY,     "CHIKUCHIKU" ; UNUSED
+	npctrade PONYTA,     SEEL,      TRADE_DIALOGSET_CASUAL,    "SAILOR"     ; CINNABAR_LAB_FOSSIL_ROOM
+	npctrade SPEAROW,    FARFETCHD, TRADE_DIALOGSET_HAPPY,     "DUX"        ; VERMILION_TRADE_HOUSE
+	npctrade SLOWBRO,    LICKITUNG, TRADE_DIALOGSET_CASUAL,    "MARC"       ; ROUTE_18_GATE_2F
+	npctrade POLIWHIRL,  JYNX,      TRADE_DIALOGSET_EVOLUTION, "LOLA"       ; CERULEAN_TRADE_HOUSE
+	npctrade RAICHU,     ELECTRODE, TRADE_DIALOGSET_EVOLUTION, "DORIS"      ; CINNABAR_LAB_TRADE_ROOM
+	npctrade VENONAT,    TANGELA,   TRADE_DIALOGSET_HAPPY,     "CRINKLES"   ; CINNABAR_LAB_TRADE_ROOM
+	npctrade NIDORAN_M,  NIDORAN_F, TRADE_DIALOGSET_HAPPY,     "SPOT"       ; UNDERGROUND_PATH_ROUTE_5
 	assert_table_length NUM_NPC_TRADES