5 files changed, 236 insertions, 0 deletions
diff --git a/data/wild/bug_contest_mons.asm b/data/wild/bug_contest_mons.asm
new file mode 100644
index 000000000..1b74fb3ee
--- /dev/null
+++ b/data/wild/bug_contest_mons.asm
@@ -0,0 +1,12 @@
+	;   %, species,   min, max
+	db 20, CATERPIE,    7, 18
+	db 20, WEEDLE,      7, 18
+	db 10, METAPOD,     9, 18
+	db 10, KAKUNA,      9, 18
+	db  5, BUTTERFREE, 12, 15
+	db  5, BEEDRILL,   12, 15
+	db 10, VENONAT,    10, 16
+	db 10, PARAS,      10, 17
+	db  5, SCYTHER,    13, 14
+	db  5, PINSIR,     13, 14
+	db -1, VENOMOTH,   30, 40
diff --git a/data/wild/probabilities.asm b/data/wild/probabilities.asm
new file mode 100644
index 000000000..a18e9d336
--- /dev/null
+++ b/data/wild/probabilities.asm
@@ -0,0 +1,15 @@
+GrassMonProbTable: ; 2a1cb
+	db 30,  $0 ; 30% chance
+	db 60,  $2 ; 30% chance
+	db 80,  $4 ; 20% chance
+	db 90,  $6 ; 10% chance
+	db 95,  $8 ;  5% chance
+	db 99,  $a ;  4% chance
+	db 100, $c ;  1% chance
+; 2a1d9
+
+WaterMonProbTable: ; 2a1d9
+	db 60,  $0 ; 60% chance
+	db 90,  $2 ; 30% chance
+	db 100, $4 ; 10% chance
+; 2a1df
diff --git a/data/wild/roammon_maps.asm b/data/wild/roammon_maps.asm
new file mode 100644
index 000000000..403ebef25
--- /dev/null
+++ b/data/wild/roammon_maps.asm
@@ -0,0 +1,31 @@
+; Maps that roaming monsters can be on, and possible maps they can jump to.
+; Notably missing are Route 40 and Route 41, which are water routes.
+
+roam_map: macro
+; map, # of other maps, other maps
+	map \1
+	db  \2
+rept \2
+	map \3
+	shift
+endr
+	db 0
+endm
+
+	roam_map ROUTE_29, 2, ROUTE_30, ROUTE_46
+	roam_map ROUTE_30, 2, ROUTE_29, ROUTE_31
+	roam_map ROUTE_31, 3, ROUTE_30, ROUTE_32, ROUTE_36
+	roam_map ROUTE_32, 3, ROUTE_36, ROUTE_31, ROUTE_33
+	roam_map ROUTE_33, 2, ROUTE_32, ROUTE_34
+	roam_map ROUTE_34, 2, ROUTE_33, ROUTE_35
+	roam_map ROUTE_35, 2, ROUTE_34, ROUTE_36
+	roam_map ROUTE_36, 4, ROUTE_35, ROUTE_31, ROUTE_32, ROUTE_37
+	roam_map ROUTE_37, 3, ROUTE_36, ROUTE_38, ROUTE_42
+	roam_map ROUTE_38, 3, ROUTE_37, ROUTE_39, ROUTE_42
+	roam_map ROUTE_39, 1, ROUTE_38
+	roam_map ROUTE_42, 4, ROUTE_43, ROUTE_44, ROUTE_37, ROUTE_38
+	roam_map ROUTE_43, 2, ROUTE_42, ROUTE_44
+	roam_map ROUTE_44, 3, ROUTE_42, ROUTE_43, ROUTE_45
+	roam_map ROUTE_45, 2, ROUTE_44, ROUTE_46
+	roam_map ROUTE_46, 2, ROUTE_45, ROUTE_29
+	db -1 ; end
diff --git a/data/wild/treemon_maps.asm b/data/wild/treemon_maps.asm
new file mode 100644
index 000000000..47491c2c9
--- /dev/null
+++ b/data/wild/treemon_maps.asm
@@ -0,0 +1,50 @@
+treemon_map: macro
+	map \1
+	db  \2 ; treemon set
+endm
+
+TreeMonMaps: ; b825e
+	treemon_map ROUTE_26, 4
+	treemon_map ROUTE_27, 4
+	treemon_map ROUTE_28, 0
+	treemon_map ROUTE_29, 3
+	treemon_map ROUTE_30, 3
+	treemon_map ROUTE_31, 3
+	treemon_map ROUTE_32, 4
+	treemon_map ROUTE_33, 2
+	treemon_map ROUTE_34, 3
+	treemon_map ROUTE_35, 3
+	treemon_map ROUTE_36, 3
+	treemon_map ROUTE_37, 3
+	treemon_map ROUTE_38, 3
+	treemon_map ROUTE_39, 3
+	treemon_map ROUTE_40, 0
+	treemon_map ROUTE_41, 0
+	treemon_map ROUTE_42, 2
+	treemon_map ROUTE_43, 5
+	treemon_map ROUTE_44, 1
+	treemon_map ROUTE_45, 1
+	treemon_map ROUTE_46, 1
+	treemon_map NEW_BARK_TOWN, 0
+	treemon_map CHERRYGROVE_CITY, 0
+	treemon_map VIOLET_CITY, 0
+	treemon_map AZALEA_TOWN, 2
+	treemon_map CIANWOOD_CITY, 0
+	treemon_map GOLDENROD_CITY, 0
+	treemon_map OLIVINE_CITY, 0
+	treemon_map ECRUTEAK_CITY, 0
+	treemon_map MAHOGANY_TOWN, 0
+	treemon_map LAKE_OF_RAGE, 5
+	treemon_map BLACKTHORN_CITY, 0
+	treemon_map SILVER_CAVE_OUTSIDE, 0
+	treemon_map ILEX_FOREST, 6
+	db -1
+; b82c5
+
+RockMonMaps: ; b82c5
+	treemon_map CIANWOOD_CITY, 7
+	treemon_map ROUTE_40, 7
+	treemon_map DARK_CAVE_VIOLET_ENTRANCE, 7
+	treemon_map SLOWPOKE_WELL_B1F, 7
+	db -1
+; b82d2
diff --git a/data/wild/treemons.asm b/data/wild/treemons.asm
new file mode 100644
index 000000000..0cb8fa83d
--- /dev/null
+++ b/data/wild/treemons.asm
@@ -0,0 +1,128 @@
+TreeMons: ; b82e8
+	dw TreeMons1
+	dw TreeMons1
+	dw TreeMons2
+	dw TreeMons3
+	dw TreeMons4
+	dw TreeMons5
+	dw TreeMons6
+	dw RockMons
+	dw TreeMons1
+
+; Two tables each (common, rare).
+; Structure:
+;	db  %, species, level
+
+TreeMons1: ; b82fa
+; common
+	db 50, SPEAROW,    10
+	db 15, SPEAROW,    10
+	db 15, SPEAROW,    10
+	db 10, AIPOM,      10
+	db  5, AIPOM,      10
+	db  5, AIPOM,      10
+	db -1
+; rare
+	db 50, SPEAROW,    10
+	db 15, HERACROSS,  10
+	db 15, HERACROSS,  10
+	db 10, AIPOM,      10
+	db  5, AIPOM,      10
+	db  5, AIPOM,      10
+	db -1
+
+TreeMons2: ; b8320
+; common
+	db 50, SPEAROW,    10
+	db 15, EKANS,      10
+	db 15, SPEAROW,    10
+	db 10, AIPOM,      10
+	db  5, AIPOM,      10
+	db  5, AIPOM,      10
+	db -1
+; rare
+	db 50, SPEAROW,    10
+	db 15, HERACROSS,  10
+	db 15, HERACROSS,  10
+	db 10, AIPOM,      10
+	db  5, AIPOM,      10
+	db  5, AIPOM,      10
+	db -1
+
+TreeMons3: ; b8346
+; common
+	db 50, HOOTHOOT,   10
+	db 15, SPINARAK,   10
+	db 15, LEDYBA,     10
+	db 10, EXEGGCUTE,  10
+	db  5, EXEGGCUTE,  10
+	db  5, EXEGGCUTE,  10
+	db -1
+; rare
+	db 50, HOOTHOOT,   10
+	db 15, PINECO,     10
+	db 15, PINECO,     10
+	db 10, EXEGGCUTE,  10
+	db  5, EXEGGCUTE,  10
+	db  5, EXEGGCUTE,  10
+	db -1
+
+TreeMons4: ; b836c
+; common
+	db 50, HOOTHOOT,   10
+	db 15, EKANS,      10
+	db 15, HOOTHOOT,   10
+	db 10, EXEGGCUTE,  10
+	db  5, EXEGGCUTE,  10
+	db  5, EXEGGCUTE,  10
+	db -1
+; rare
+	db 50, HOOTHOOT,   10
+	db 15, PINECO,     10
+	db 15, PINECO,     10
+	db 10, EXEGGCUTE,  10
+	db  5, EXEGGCUTE,  10
+	db  5, EXEGGCUTE,  10
+	db -1
+
+TreeMons5: ; b8392
+; common
+	db 50, HOOTHOOT,   10
+	db 15, VENONAT,    10
+	db 15, HOOTHOOT,   10
+	db 10, EXEGGCUTE,  10
+	db  5, EXEGGCUTE,  10
+	db  5, EXEGGCUTE,  10
+	db -1
+; rare
+	db 50, HOOTHOOT,   10
+	db 15, PINECO,     10
+	db 15, PINECO,     10
+	db 10, EXEGGCUTE,  10
+	db  5, EXEGGCUTE,  10
+	db  5, EXEGGCUTE,  10
+	db -1
+
+TreeMons6: ; b83b8
+; common
+	db 50, HOOTHOOT,   10
+	db 15, PINECO,     10
+	db 15, PINECO,     10
+	db 10, NOCTOWL,    10
+	db  5, BUTTERFREE, 10
+	db  5, BEEDRILL,   10
+	db -1
+; rare
+	db 50, HOOTHOOT,   10
+	db 15, CATERPIE,   10
+	db 15, WEEDLE,     10
+	db 10, HOOTHOOT,   10
+	db  5, METAPOD,    10
+	db  5, KAKUNA,     10
+	db -1
+
+RockMons: ; b83de
+	db 90, KRABBY,     15
+	db 10, SHUCKLE,    15
+	db -1
+; b83e5