Pokemon Yellow glitch maps 0xF9-0xFF encounters memory dumps

Notes:
1. A potential map header from RAM would influence D366 for the tileset.
2. The grass/cave encounter rate for 0xF9 is sourced from FFFF (a read attempt of the interrupt enable flag); the pointer for the rest of the encounters then rolls over to 0000 (the start of the ROM).


Map 255 (FF):

Grass or cave encounter RATE:
248
Grass or cave encounter LEVEL slot 1:
2
Grass or cave encounter SPECIES slot 1:
205
Jr. Trainer M (Trainer/0xCD)
Grass or cave encounter LEVEL slot 2:
157
Grass or cave encounter SPECIES slot 2:
48
DROWZEE
Grass or cave encounter LEVEL slot 3:
32
Grass or cave encounter SPECIES slot 3:
66
DRAGONITE
Grass or cave encounter LEVEL slot 4:
255
Grass or cave encounter SPECIES slot 4:
132
SNORLAX
Grass or cave encounter LEVEL slot 5:
54
Grass or cave encounter SPECIES slot 5:
240
Sabrina (Trainer/0xF0)
Grass or cave encounter LEVEL slot 6:
235
Grass or cave encounter SPECIES slot 6:
167
NIDORINO
Grass or cave encounter LEVEL slot 7:
202
Grass or cave encounter SPECIES slot 7:
66
DRAGONITE
Grass or cave encounter LEVEL slot 8:
2
Grass or cave encounter SPECIES slot 8:
175
MISSINGNO. 0xAF
Grass or cave encounter LEVEL slot 9:
234
Grass or cave encounter SPECIES slot 9:
53
ELECTABUZZ
Grass or cave encounter LEVEL slot 10:
212
Grass or cave encounter SPECIES slot 10:
248
' (Trainer/0xF8)
Water encounter RATE:
94
Water encounter LEVEL slot 1:
9
Water encounter SPECIES slot 1:
205
Jr. Trainer M (Trainer/0xCD)
Water encounter LEVEL Slot 2:
254
Water encounter SPECIES Slot 2:
25
GASTLY
Water encounter LEVEL Slot 3:
91
Water encounter SPECIES Slot 3:
39
GRAVELER
Water encounter LEVEL Slot 4:
167
Water encounter SPECIES Slot 4:
202
Bug Catcher (Trainer/0xCA)
Water encounter LEVEL Slot 5:
66
Water encounter SPECIES Slot 5:
2
KANGASKHAN
Water encounter LEVEL Slot 6:
62
Water encounter SPECIES Slot 6:
53
ELECTABUZZ
Water encounter LEVEL Slot 7:
205
Water encounter SPECIES Slot 7:
180
CHARIZARD
Water encounter LEVEL Slot 8:
62
Water encounter SPECIES Slot 8:
205
Jr. Trainer M (Trainer/0xCD)
Water encounter LEVEL Slot 9:
255
Water encounter SPECIES Slot 9:
211
Burglar (Trainer/0xD3)
Water encounter LEVEL Slot 10:
71
Water encounter SPECIES Slot 10:
96
SANDSHREW

Old Rod encounters:
MAGIKARP, Level 5 (100%)
Will always fish up a Pokemon.

Good Rod encounters:
GOLDEEN, Level 10 (50%)
POLIWAG, Level 10 (50%)
May fail to fish up a Pokemon.

Super Rod encounters:
I haven't implemented this yet, but all glitch maps would return: Looks like there's nothing here.

Rod encounters only work when the tileset is 0, 3, 5, 7, 13, 14, 17, 22 or 23 and when you are facing water. You can adjust this with expanded inventory (D366, item 37 quantity).
The current tileset is:
240


Map 254 (FE):

Grass or cave encounter RATE:
26
Grass or cave encounter LEVEL slot 1:
7
Grass or cave encounter SPECIES slot 1:
225
Rival Class 1 (Trainer/0xE1)
Grass or cave encounter LEVEL slot 2:
218
Grass or cave encounter SPECIES slot 2:
26
SCYTHER
Grass or cave encounter LEVEL slot 3:
5
Grass or cave encounter SPECIES slot 3:
195
( Z4 (0xC3)
Grass or cave encounter LEVEL slot 4:
66
Grass or cave encounter SPECIES slot 4:
2
KANGASKHAN
Grass or cave encounter LEVEL slot 5:
205
Grass or cave encounter SPECIES slot 5:
202
Bug Catcher (Trainer/0xCA)
Grass or cave encounter LEVEL slot 6:
12
Grass or cave encounter SPECIES slot 6:
218
Beauty (Trainer/0xDA)
Grass or cave encounter LEVEL slot 7:
66
Grass or cave encounter SPECIES slot 7:
2
KANGASKHAN
Grass or cave encounter LEVEL slot 8:
62
Grass or cave encounter SPECIES slot 8:
8
SLOWBRO
Grass or cave encounter LEVEL slot 9:
234
Grass or cave encounter SPECIES slot 9:
196
X - x, (0xC4)
Grass or cave encounter LEVEL slot 10:
207
Grass or cave encounter SPECIES slot 10:
33
GROWLITHE
Water encounter RATE:
8
Water encounter LEVEL slot 1:
76
Water encounter SPECIES slot 1:
6
VOLTORB
Water encounter LEVEL Slot 2:
63
Water encounter SPECIES Slot 2:
205
Jr. Trainer M (Trainer/0xCD)
Water encounter LEVEL Slot 3:
132
Water encounter SPECIES Slot 3:
62
MISSINGNO. 0x3E
Water encounter LEVEL Slot 4:
24
Water encounter SPECIES Slot 4:
6
VOLTORB
Water encounter LEVEL Slot 5:
205
Water encounter SPECIES Slot 5:
240
Sabrina (Trainer/0xF0)
Water encounter LEVEL Slot 6:
15
Water encounter SPECIES Slot 6:
205
Jr. Trainer M (Trainer/0xCD)
Water encounter LEVEL Slot 7:
28
Water encounter SPECIES Slot 7:
35
FEAROW
Water encounter LEVEL Slot 8:
33
Water encounter SPECIES Slot 8:
96
SANDSHREW
Water encounter LEVEL Slot 9:
205
Water encounter SPECIES Slot 9:
203
Lass (Trainer/0xCB)
Water encounter LEVEL Slot 10:
150
Water encounter SPECIES Slot 10:
175
MISSINGNO. 0xAF

Old Rod encounters:
MAGIKARP, Level 5 (100%)
Will always fish up a Pokemon.

Good Rod encounters:
GOLDEEN, Level 10 (50%)
POLIWAG, Level 10 (50%)
May fail to fish up a Pokemon.

Super Rod encounters:
I haven't implemented this yet, but all glitch maps would return: Looks like there's nothing here.

Rod encounters only work when the tileset is 0, 3, 5, 7, 13, 14, 17, 22 or 23 and when you are facing water. You can adjust this with expanded inventory (D366, item 37 quantity).
The current tileset is:
0

Map 253 (FD):

Grass or cave encounter RATE:
64
Grass or cave encounter LEVEL slot 1:
205
Grass or cave encounter SPECIES slot 1:
132
SNORLAX
Grass or cave encounter LEVEL slot 2:
62
Grass or cave encounter SPECIES slot 2:
33
GROWLITHE
Grass or cave encounter LEVEL slot 3:
49
Grass or cave encounter SPECIES slot 3:
215
Swimmer (Trainer/0xD7)
Grass or cave encounter LEVEL slot 4:
203
Grass or cave encounter SPECIES slot 4:
102
EEVEE
Grass or cave encounter LEVEL slot 5:
203
Grass or cave encounter SPECIES slot 5:
166
RATICATE
Grass or cave encounter LEVEL slot 6:
33
Grass or cave encounter SPECIES slot 6:
44
HITMONCHAN
Grass or cave encounter LEVEL slot 7:
215
Grass or cave encounter SPECIES slot 7:
203
Lass (Trainer/0xCB)
Grass or cave encounter LEVEL slot 8:
174
Grass or cave encounter SPECIES slot 8:
205
Jr. Trainer M (Trainer/0xCD)
Grass or cave encounter LEVEL slot 9:
28
Grass or cave encounter SPECIES slot 9:
35
FEAROW
Grass or cave encounter LEVEL slot 10:
33
Grass or cave encounter SPECIES slot 10:
37
SLOWPOKE
Water encounter RATE:
209
Water encounter LEVEL slot 1:
203
Water encounter SPECIES slot 1:
238
Koga (Trainer/0xEE)
Water encounter LEVEL Slot 2:
203
Water encounter SPECIES Slot 2:
246
Agatha (Trainer/0xF6)
Water encounter LEVEL Slot 3:
175
Water encounter SPECIES Slot 3:
234
Brock (Trainer/0xEA)
Water encounter LEVEL Slot 4:
107
Water encounter SPECIES Slot 4:
205
Jr. Trainer M (Trainer/0xCD)
Water encounter LEVEL Slot 5:
205
Water encounter SPECIES Slot 5:
100
JIGGLYPUFF
Water encounter LEVEL Slot 6:
30
Water encounter SPECIES Slot 6:
205
Jr. Trainer M (Trainer/0xCD)
Water encounter LEVEL Slot 7:
100
Water encounter SPECIES Slot 7:
30
TANGELA
Water encounter LEVEL Slot 8:
205
Water encounter SPECIES Slot 8:
42
MR.MIME
Water encounter LEVEL Slot 9:
52
Water encounter SPECIES Slot 9:
205
Jr. Trainer M (Trainer/0xCD)
Water encounter LEVEL Slot 10:
111
Water encounter SPECIES Slot 10:
30
TANGELA

Old Rod encounters:
MAGIKARP, Level 5 (100%)
Will always fish up a Pokemon.

Good Rod encounters:
GOLDEEN, Level 10 (50%)
POLIWAG, Level 10 (50%)
May fail to fish up a Pokemon.

Super Rod encounters:
I haven't implemented this yet, but all glitch maps would return: Looks like there's nothing here.

Rod encounters only work when the tileset is 0, 3, 5, 7, 13, 14, 17, 22 or 23 and when you are facing water. You can adjust this with expanded inventory (D366, item 37 quantity).
The current tileset is:
1

Map 252 (FC):

Grass or cave encounter RATE:
238
Grass or cave encounter LEVEL slot 1:
203
Grass or cave encounter SPECIES slot 1:
246
Agatha (Trainer/0xF6)
Grass or cave encounter LEVEL slot 2:
175
Grass or cave encounter SPECIES slot 2:
224
Blackbelt (Trainer/0xE0)
Grass or cave encounter LEVEL slot 3:
180
Grass or cave encounter SPECIES slot 3:
250
4 8 ) (Trainer/0xFA)
Grass or cave encounter LEVEL slot 4:
93
Grass or cave encounter SPECIES slot 4:
211
Burglar (Trainer/0xD3)
Grass or cave encounter LEVEL slot 5:
254
Grass or cave encounter SPECIES slot 5:
166
RATICATE
Grass or cave encounter LEVEL slot 6:
32
Grass or cave encounter SPECIES slot 6:
5
SPEAROW
Grass or cave encounter LEVEL slot 7:
33
Grass or cave encounter SPECIES slot 7:
154
VENUSAUR
Grass or cave encounter LEVEL slot 8:
215
Grass or cave encounter SPECIES slot 8:
203
Lass (Trainer/0xCB)
Grass or cave encounter LEVEL slot 9:
254
Grass or cave encounter SPECIES slot 9:
33
GROWLITHE
Grass or cave encounter LEVEL slot 10:
45
Grass or cave encounter SPECIES slot 10:
215
Swimmer (Trainer/0xD7)
Water encounter RATE:
203
Water encounter LEVEL slot 1:
238
Water encounter SPECIES slot 1:
250
4 8 ) (Trainer/0xFA)
Water encounter LEVEL Slot 2:
93
Water encounter SPECIES Slot 2:
211
Burglar (Trainer/0xD3)
Water encounter LEVEL Slot 3:
254
Water encounter SPECIES Slot 3:
40
CHANSEY
Water encounter LEVEL Slot 4:
202
Water encounter SPECIES Slot 4:
79
MISSINGNO.
Water encounter LEVEL Slot 5:
4
Water encounter SPECIES Slot 5:
33
GROWLITHE
Water encounter LEVEL Slot 6:
232
Water encounter SPECIES Slot 6:
74
ARTICUNO
Water encounter LEVEL Slot 7:
6
Water encounter SPECIES Slot 7:
15
NIDORAN F
Water encounter LEVEL Slot 8:
205
Water encounter SPECIES Slot 8:
132
SNORLAX
Water encounter LEVEL Slot 9:
62
Water encounter SPECIES Slot 9:
122
MISSINGNO. 0x7A
Water encounter LEVEL Slot 10:
167
Water encounter SPECIES Slot 10:
40
CHANSEY

Old Rod encounters:
MAGIKARP, Level 5 (100%)
Will always fish up a Pokemon.

Good Rod encounters:
GOLDEEN, Level 10 (50%)
POLIWAG, Level 10 (50%)
May fail to fish up a Pokemon.

Super Rod encounters:
I haven't implemented this yet, but all glitch maps would return: Looks like there's nothing here.

Rod encounters only work when the tileset is 0, 3, 5, 7, 13, 14, 17, 22 or 23 and when you are facing water. You can adjust this with expanded inventory (D366, item 37 quantity).
The current tileset is:
250


Map 251 (FB):

Grass or cave encounter RATE:
240
Grass or cave encounter LEVEL slot 1:
11
Grass or cave encounter SPECIES slot 1:
11
LICKITUNG
Grass or cave encounter LEVEL slot 2:
7
Grass or cave encounter SPECIES slot 2:
40
CHANSEY
Grass or cave encounter LEVEL slot 3:
9
Grass or cave encounter SPECIES slot 3:
62
MISSINGNO. 0x3E
Grass or cave encounter LEVEL slot 4:
1
Grass or cave encounter SPECIES slot 4:
234
Brock (Trainer/0xEA)
Grass or cave encounter LEVEL slot 5:
3
Grass or cave encounter SPECIES slot 5:
193
Female Symbol . (0xC1)
Grass or cave encounter LEVEL slot 6:
62
Grass or cave encounter SPECIES slot 6:
4
CLEFAIRY
Grass or cave encounter LEVEL slot 7:
24
Grass or cave encounter SPECIES slot 7:
38
KADABRA
Grass or cave encounter LEVEL slot 8:
80
Grass or cave encounter SPECIES slot 8:
12
EXEGGCUTE
Grass or cave encounter LEVEL slot 9:
40
Grass or cave encounter SPECIES slot 9:
9
IVYSAUR
Grass or cave encounter LEVEL slot 10:
62
Grass or cave encounter SPECIES slot 10:
255
, A (Trainer/0xFF)
Water encounter RATE:
234
Water encounter LEVEL slot 1:
3
Water encounter SPECIES slot 1:
193
Female Symbol . (0xC1)
Water encounter LEVEL Slot 2:
62
Water encounter SPECIES Slot 2:
8
SLOWBRO
Water encounter LEVEL Slot 3:
24
Water encounter SPECIES Slot 3:
24
TENTACOOL
Water encounter LEVEL Slot 4:
203
Water encounter SPECIES Slot 4:
111
POLIWRATH
Water encounter LEVEL Slot 5:
40
Water encounter SPECIES Slot 5:
9
IVYSAUR
Water encounter LEVEL Slot 6:
80
Water encounter SPECIES Slot 6:
23
SHELLDER
Water encounter LEVEL Slot 7:
230
Water encounter SPECIES Slot 7:
5
SPEAROW
Water encounter LEVEL Slot 8:
193
Water encounter SPECIES Slot 8:
62
MISSINGNO. 0x3E
Water encounter LEVEL Slot 9:
2
Water encounter SPECIES Slot 9:
24
TENTACOOL
Water encounter LEVEL Slot 10:
11
Water encounter SPECIES Slot 10:
203
Lass (Trainer/0xCB)

Old Rod encounters:
MAGIKARP, Level 5 (100%)
Will always fish up a Pokemon.

Good Rod encounters:
GOLDEEN, Level 10 (50%)
POLIWAG, Level 10 (50%)
May fail to fish up a Pokemon.

Super Rod encounters:
I haven't implemented this yet, but all glitch maps would return: Looks like there's nothing here.

Rod encounters only work when the tileset is 0, 3, 5, 7, 13, 14, 17, 22 or 23 and when you are facing water. You can adjust this with expanded inventory (D366, item 37 quantity).
The current tileset is:
13


Map 250 (FA):

Grass or cave encounter RATE:
255
Grass or cave encounter LEVEL slot 1:
0
Grass or cave encounter SPECIES slot 1:
0
3TrainerPoke (00)
Grass or cave encounter LEVEL slot 2:
0
Grass or cave encounter SPECIES slot 2:
0
3TrainerPoke (00)
Grass or cave encounter LEVEL slot 3:
0
Grass or cave encounter SPECIES slot 3:
0
3TrainerPoke (00)
Grass or cave encounter LEVEL slot 4:
0
Grass or cave encounter SPECIES slot 4:
255
, A (Trainer/0xFF)
Grass or cave encounter LEVEL slot 5:
0
Grass or cave encounter SPECIES slot 5:
0
3TrainerPoke (00)
Grass or cave encounter LEVEL slot 6:
0
Grass or cave encounter SPECIES slot 6:
0
3TrainerPoke (00)
Grass or cave encounter LEVEL slot 7:
0
Grass or cave encounter SPECIES slot 7:
0
3TrainerPoke (00)
Grass or cave encounter LEVEL slot 8:
0
Grass or cave encounter SPECIES slot 8:
255
, A (Trainer/0xFF)
Grass or cave encounter LEVEL slot 9:
0
Grass or cave encounter SPECIES slot 9:
0
3TrainerPoke (00)
Grass or cave encounter LEVEL slot 10:
0
Grass or cave encounter SPECIES slot 10:
0
3TrainerPoke (00)
Water encounter RATE:
0
Water encounter LEVEL slot 1:
0
Water encounter SPECIES slot 1:
111
POLIWRATH
Water encounter LEVEL Slot 2:
0
Water encounter SPECIES Slot 2:
0
3TrainerPoke (00)
Water encounter LEVEL Slot 3:
4
Water encounter SPECIES Slot 3:
4
CLEFAIRY
Water encounter LEVEL Slot 4:
90
Water encounter SPECIES Slot 4:
28
BLASTOISE
Water encounter LEVEL Slot 5:
163
Water encounter SPECIES Slot 5:
40
CHANSEY
Water encounter LEVEL Slot 6:
129
Water encounter SPECIES Slot 6:
69
MISSINGNO. 0x45
Water encounter LEVEL Slot 7:
204
Water encounter SPECIES Slot 7:
0
3TrainerPoke (00)
Water encounter LEVEL Slot 8:
214
Water encounter SPECIES Slot 8:
88
DRATINI
Water encounter LEVEL Slot 9:
0
Water encounter SPECIES Slot 9:
0
3TrainerPoke (00)
Water encounter LEVEL Slot 10:
0
Water encounter SPECIES Slot 10:
0
3TrainerPoke (00)

Old Rod encounters:
MAGIKARP, Level 5 (100%)
Will always fish up a Pokemon.

Good Rod encounters:
GOLDEEN, Level 10 (50%)
POLIWAG, Level 10 (50%)
May fail to fish up a Pokemon.

Super Rod encounters:
I haven't implemented this yet, but all glitch maps would return: Looks like there's nothing here.

Rod encounters only work when the tileset is 0, 3, 5, 7, 13, 14, 17, 22 or 23 and when you are facing water. You can adjust this with expanded inventory (D366, item 37 quantity).
The current tileset is:
250


Map 249 (F9):

Grass or cave encounter RATE:
13
Grass or cave encounter LEVEL slot 1:
255
Grass or cave encounter SPECIES slot 1:
0
3TrainerPoke (00)
Grass or cave encounter LEVEL slot 2:
0
Grass or cave encounter SPECIES slot 2:
0
3TrainerPoke (00)
Grass or cave encounter LEVEL slot 3:
0
Grass or cave encounter SPECIES slot 3:
0
3TrainerPoke (00)
Grass or cave encounter LEVEL slot 4:
0
Grass or cave encounter SPECIES slot 4:
0
3TrainerPoke (00)
Grass or cave encounter LEVEL slot 5:
255
Grass or cave encounter SPECIES slot 5:
0
3TrainerPoke (00)
Grass or cave encounter LEVEL slot 6:
0
Grass or cave encounter SPECIES slot 6:
0
3TrainerPoke (00)
Grass or cave encounter LEVEL slot 7:
0
Grass or cave encounter SPECIES slot 7:
0
3TrainerPoke (00)
Grass or cave encounter LEVEL slot 8:
0
Grass or cave encounter SPECIES slot 8:
0
3TrainerPoke (00)
Grass or cave encounter LEVEL slot 9:
255
Grass or cave encounter SPECIES slot 9:
0
3TrainerPoke (00)
Grass or cave encounter LEVEL slot 10:
0
Grass or cave encounter SPECIES slot 10:
0
3TrainerPoke (00)
Water encounter RATE:
0
Water encounter LEVEL slot 1:
0
Water encounter SPECIES slot 1:
111
POLIWRATH
Water encounter LEVEL Slot 2:
0
Water encounter SPECIES Slot 2:
0
3TrainerPoke (00)
Water encounter LEVEL Slot 3:
4
Water encounter SPECIES Slot 3:
4
CLEFAIRY
Water encounter LEVEL Slot 4:
90
Water encounter SPECIES Slot 4:
28
BLASTOISE
Water encounter LEVEL Slot 5:
163
Water encounter SPECIES Slot 5:
40
CHANSEY
Water encounter LEVEL Slot 6:
129
Water encounter SPECIES Slot 6:
69
MISSINGNO. 0x45
Water encounter LEVEL Slot 7:
204
Water encounter SPECIES Slot 7:
0
3TrainerPoke (00)
Water encounter LEVEL Slot 8:
214
Water encounter SPECIES Slot 8:
88
DRATINI
Water encounter LEVEL Slot 9:
0
Water encounter SPECIES Slot 9:
0
3TrainerPoke (00)
Water encounter LEVEL Slot 10:
0
Water encounter SPECIES Slot 10:
0
3TrainerPoke (00)

Old Rod encounters:
MAGIKARP, Level 5 (100%)
Will always fish up a Pokemon.

Good Rod encounters:
GOLDEEN, Level 10 (50%)
POLIWAG, Level 10 (50%)
May fail to fish up a Pokemon.

Super Rod encounters:
I haven't implemented this yet, but all glitch maps would return: Looks like there's nothing here.

Rod encounters only work when the tileset is 0, 3, 5, 7, 13, 14, 17, 22 or 23 and when you are facing water. You can adjust this with expanded inventory (D366, item 37 quantity).
The current tileset is:
250