Wild Pokémon Table Documentation

Wild Pokémon Table Documentation

The wild Pokémon encounter table didn't receive many overhauls, just adding form support in the form of turning the numerous species fields into (form << 11 | species). Here is the structure of the encounter tables, which is unchanged from vanilla:

typedef struct
{
    u8 minLevel;
    u8 maxLevel;
    u16 species;
} __attribute__((packed)) StandardEncounter;

typedef	struct
{
    u8 walkingEncounterRate;
    u8 surfEncounterRate;
    u8 rockSmashEncounterRate;
    u8 oldRodRate;

    u8 goodRodRate;
    u8 superRodRate;
    u16 padding_x6; // get word-aligned for the next array

    u8 walkingLevels[12];
    u16 morningMons[12];
    u16 dayMons[12];
    u16 nightMons[12];

    u16 hoennMons[2];
    u16 sinnohMons[2];

    StandardEncounter surfEncounters[5];
    StandardEncounter rockSmashEncounters[2];
    StandardEncounter oldRodEncounters[5];
    StandardEncounter goodRodEncounters[5];
    StandardEncounter superRodEncounters[5];

    u16 swarmMons[4];    
} __attribute__((packed)) EncounterData;

Every u16 field in this structure (including the StandardEncounter substructure) represents a species of Pokémon. These have all been changed to be interpreted as (form << 11 | species). This allows for up to 2048 indices of Pokémon, and mirrors what was implemented in vanilla for trainer Pokémon species.

The vanilla wild encounters are dumped to armips/data/encounters.s. The format is pretty intuitive, and basically follows the above format pretty closely for each:

Click for example wild encounter table!

encounterdata  69 // creates the file to populate

walkrate 10
surfrate 10
rocksmashrate 50
oldrodrate 25
goodrodrate 50
superrodrate 75
walklevels 3, 2, 3, 2, 2, 2, 4, 4, 3, 4, 3, 4
// walklevels specifies the levels of each slot.  each slot gets its own individual level without a range, which is different compared to the encounter format of later entries.
// replace "pokemon SPECIES_*" with "monwithform SPECIES_*, formid" to get the specific form of a pokemon.  if i want a galarian darumaka, i'd put "monwithform SPECIES_DARUMAKA, 1"
// probabilities:  20, 20, 10, 10, 10, 10, 5, 5, 4, 4, 1, 1


// morning encounter slots
pokemon SPECIES_GEODUDE
pokemon SPECIES_ZUBAT
pokemon SPECIES_GEODUDE
pokemon SPECIES_ZUBAT
pokemon SPECIES_GEODUDE
pokemon SPECIES_GEODUDE
pokemon SPECIES_GEODUDE
pokemon SPECIES_GEODUDE
pokemon SPECIES_ZUBAT
pokemon SPECIES_ZUBAT
pokemon SPECIES_ZUBAT
pokemon SPECIES_DUNSPARCE

// day encounter slots
pokemon SPECIES_GEODUDE
pokemon SPECIES_ZUBAT
pokemon SPECIES_GEODUDE
pokemon SPECIES_ZUBAT
pokemon SPECIES_GEODUDE
pokemon SPECIES_GEODUDE
pokemon SPECIES_GEODUDE
pokemon SPECIES_GEODUDE
pokemon SPECIES_ZUBAT
pokemon SPECIES_ZUBAT
pokemon SPECIES_ZUBAT
pokemon SPECIES_DUNSPARCE

// night encounter slots
pokemon SPECIES_GEODUDE
pokemon SPECIES_ZUBAT
pokemon SPECIES_GEODUDE
pokemon SPECIES_ZUBAT
pokemon SPECIES_GEODUDE
pokemon SPECIES_GEODUDE
pokemon SPECIES_GEODUDE
pokemon SPECIES_GEODUDE
pokemon SPECIES_ZUBAT
pokemon SPECIES_ZUBAT
pokemon SPECIES_ZUBAT
pokemon SPECIES_DUNSPARCE

// hoenn encounter slots
pokemon SPECIES_ABSOL
pokemon SPECIES_MAKUHITA

// sinnoh encounter slots
pokemon SPECIES_BRONZOR
pokemon SPECIES_CHINGLING

// the encounter macro specifies a minlevel and a maxlevel
// this is used for the following encounters and not for the normal grass encounters (for some reason)
// either way, change "encounter SPECIES_*, minlevel, maxlevel" to "encounterwithform SPECIES_*, formid, minlevel, maxlevel" to add the form to the new encounter

// surf encounters
// probabilities:  60, 30, 5, 4, 1
encounter SPECIES_MAGIKARP, 10, 20
encounter SPECIES_MAGIKARP, 5, 15
encounter SPECIES_MAGIKARP, 2, 10
encounter SPECIES_MAGIKARP, 2, 10
encounter SPECIES_MAGIKARP, 2, 10

// rock smash encounters
// probabilities:  90, 10
encounter SPECIES_DUNSPARCE, 4, 8
encounter SPECIES_GEODUDE, 8, 14

// old rod encounters
// probabilities:  60, 30, 5, 4, 1
encounter SPECIES_MAGIKARP, 10, 10
encounter SPECIES_MAGIKARP, 10, 10
encounter SPECIES_MAGIKARP, 10, 10
encounter SPECIES_GOLDEEN, 10, 10
encounter SPECIES_GOLDEEN, 10, 10

// good rod encounters
// probabilities:  40, 40, 15, 4, 1
encounter SPECIES_MAGIKARP, 20, 20
encounter SPECIES_GOLDEEN, 20, 20
encounter SPECIES_GOLDEEN, 20, 20
encounter SPECIES_GOLDEEN, 20, 20
encounter SPECIES_GOLDEEN, 20, 20

// super rod encounters
// probabilities:  40, 40, 15, 4, 1
encounter SPECIES_GOLDEEN, 40, 40
encounter SPECIES_GOLDEEN, 40, 40
encounter SPECIES_MAGIKARP, 40, 40
encounter SPECIES_SEAKING, 40, 40
encounter SPECIES_MAGIKARP, 40, 40

// swarm grass
pokemon SPECIES_DUNSPARCE
// swarm surf
pokemon SPECIES_MAGIKARP
// swarm good rod
pokemon SPECIES_GOLDEEN
// swarm super rod
pokemon SPECIES_MAGIKARP

.close

If you wanted a Pokémon with a form to appear in the wild, any pokemon slot would just change to a monwithform, and any encounter into an encounterwithform:

pokemon SPECIES_GEODUDE
...
monwithform SPECIES_GEODUDE, 1 // alolan geodude

...

encounter SPECIES_GRAVELER, 40, 40
...
encounterwithform SPECIES_GRAVELER, 1, 40, 40 // alolan graveler