While playing, the current level ID can be found at 800AF3C0(U). Arrays of the levels script pointers can be found at 800AC03C(U) and 800AC058(U). The routine used for loading a level is at 800E303C(U), where A0 is the level ID to load.
| Value | Level Description |
|---|---|
| 0x00 | Beach |
| 0x01 | Tunnel |
| 0x02 | Volcano |
| 0x03 | River |
| 0x04 | Cave |
| 0x05 | Valley |
| 0x06 | Rainbow Clouds |
| 0x07 | Dummy? |
| 0x08 | Title |
| 0x09 | Rate Pictures |
| 0x0A | Dummy? |
| 0x0B | Professor Oak |
| 0x0C | Pokémon Album |
| 0x0D | Professor Oak |
| 0x0E | Pokemon Report |
| 0x0F | Professor Oak's Check |
| 0x10 | Dummy? |
| 0x11 | Credits |
| 0x12 | Credits |
| 0x13 | Credits |
| 0x14 | Credits |
| 0x15 | Beach Demo |
| 0x16 | Gallery |
| 0x17 | Gallery |
| 0x18 | Unused Japanese Screen |
The unused Japanese screen can be seen in the video below.
Below is an incomplete list of level data locations in the USA ROM/RAM.
| Level | RAM Pointer | ROM Start | ROM End | RAM Start | RAM End |
|---|---|---|---|---|---|
| Beach | 800ABE34 | 0055C110 | 005DF5D0 | 802C40A0 | 802CBE10 |
| Tunnel | 800ABE7C | 005DF5D0 | 006401B0 | - | - |
| Cave | 800ABEC4 | 006401B0 | 006C05E0 | - | - |
| River | 800AFF0C | 006C05E0 | 007272E0 | - | - |
| Volcano | 800ABF54 | 007272E0 | 0079F1B0 | - | - |
| Valley | 800ABF9C | 0079F1B0 | 00825E30 | - | - |
| Rainbow | 800ABFE4 | 00825E30 | 0082F8E0 | 803466C0 | - |
8009AE10(U) loads the level script into memory, 8009B634(U) loads some level-specific information.
The polygon data for Beach can be found at 0x5B0F80(U) and the display list at 0x5B23B0(U), other levels are yet to be documented. Below is a table of model data locations discovered for the USA ROM/RAM, this list is currently quite small.
| Description | ROM Offset | RAM Offset |
|---|---|---|
| Beach (Level) | 0055C110 | 802C40A0 |
| Rainbow Clouds (Level) | 00825E30 | 803466C0 |
| Butterfree | 005B4048 | - |
| Doduo | 005B6060 | - |
| Kangaskhan | 005C3470 | - |
| Meowth | 005D2E80 | - |
| Mew | 0082F200 | - |
A table of music sequences can be found at 0xAEFC10(U)/800604D0(U). The current music ID playing is stored at 803A66C0(U).
| Value | Level Description |
|---|---|
| 0x00 | Beach |
| 0x01 | Pokéflute 1 |
| 0x02 | Pokéflute 2 |
| 0x03 | Pokéflute 3 |
| 0x04 | Tunnel (Electrified) |
| 0x05 | Volcano |
| 0x06 | River |
| 0x07 | Valley |
| 0x08 | Professor Oak |
| 0x09 | Ranking Photos |
| 0x0A | Pokemon Album |
| 0x0B | Credits |
| 0x0C | Scores |
| 0x0D | Cave |
| 0x0E | Rainbow |
| 0x0F | Falling Droplets |
| 0x10 | Final Ranking |
| 0x11 | Failure? |
| 0x12 | Cheery? |
| 0x13 | Mystic? |
| 0x14 | Birds |
| 0x15 | Birds |
| 0x16 | Empty |
| 0x17 | Title |
| 0x18 | Jigglypuff |
| 0x19 | Intro |
| 0x1A | Level Select |
| 0x1B | Options |
| 0x1C | Approaching Mew |
| 0x1D | Level Complete? |
| 0x1E | Mystic? |
| 0x1F | Chime |
| 0x20 | Fanfare 1 |
| 0x21 | Fanfare 2 |
| 0x22 | Jazz |
| 0x23 | Fanfare 3 |
| 0x24 | Mystic? |
All player data can be found at 80366BA4(U). 800E3C50(U) stores the player's rotation, 800E3C94/800E3CE0(U) updates X position, 800E3CA4/800E3CE4(U) updates Y position, and 800E3CB4/800E3CEC(U) updated Z position. 800E3DFC(U), 800E3E28(U) and 800E3E94(U) handle the transition into the next chunk of the level, while 800E3D9C(U) determines whether to jump to the next section. The Beach second section object is found at 801FFAD0(U) and the third section at 801FFDF0(U), no further details have been documented.
The checksum for this game can be removed by deleting the assembly command at 0x658(U).
Below is an experimental code to enable free-roam in the USA ROM, the checksum must be disabled for this to work.
0x61490: NOP NOP SWC1 F22, $0020 (R16) NOP 0x61400: NOP 0x61444: NOP 0x61464: NOP 0x61474: NOP 0x61680: NOP 0x613E8: LUI A3, $8036 ORI A3, A3, $6BA4 LWC1 F20, $000C (A3) - Get object X position LWC1 F21, $0010 (A3) - Get object Y position LWC1 F22, $0014 (A3) - Get object Z position LUI A2, $4100 - How fast to move object MTC1 A2, F23 LUI A1, $8005 - Get P2 D-pad state LB A1, $89E0 (A1) ADDIU A2, R0, $0002 BEQ A1, A2, DPAD_RIGHT ADDIU A2, R0, $0001 BEQ A1, A2, DPAD_LEFT ADDIU A2, R0, $0004 BEQ A1, A2, DPAD_UP ADDIU A2, R0, $0008 BEQ A1, A2, DPAD_DOWN NOP BEQ R0, R0, END NOP //DPAD LEFT NEG.S F23, F23 //DPAD RIGHT ADD.S F20, F20, F23 SWC1 F20, $000C (A3) BEQ R0, R0, END NOP //DPAD UP NEG.S F23, F23 //DPAD DOWN ADD.S F22, F22, F23 SWC1 F22, $0014 (A3) //END