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diff --git a/Chain-Fishing.md b/Chain-Fishing.md new file mode 100644 index 0000000..62a38d6 --- /dev/null +++ b/Chain-Fishing.md @@ -0,0 +1,107 @@ +## Chain Fishing + +This adds the chain fishing feature to emerald, where reeling in consecutive pokemon species increases the number of chances of it being shiny by up to 41 total times `(1 + 2 * streak)` + +### Open [src/wild_encounter.c](../blob/master/src/wild_encounter.c) +**1.** We need 3 new EWRAM_DATA variables: +```diff ++ EWRAM_DATA u8 gChainFishingStreak = 0; ++ EWRAM_DATA static u16 sLastFishingSpecies = 0; ++ EWRAM_DATA bool8 gIsFishingEncounter = FALSE; //same as in dizzyegg's item expansion repo +``` +**2.** Add the non-static EWRAM_DATA variables to [include/wild_encounter.h](../blob/master/include/wild_encounter.h): +```diff ++ extern u8 gChainFishingStreak; ++ extern bool8 gIsFishingEncounter; +``` + +**3.** Find the function `FishingWildEncounter` and make the following edits +```diff +void FishingWildEncounter(u8 rod) +{ + u16 species; + ++ gIsFishingEncounter = TRUE; //must be set before mon is created + if (CheckFeebas() == TRUE) + { + u8 level = ChooseWildMonLevel(&gWildFeebasRoute119Data); + species = gWildFeebasRoute119Data.species; + CreateWildMon(species, level); + } + else + { + species = GenerateFishingWildMon(gWildMonHeaders[GetCurrentMapWildMonHeaderId()].fishingMonsInfo, rod); + } + ++ if (species == sLastFishingSpecies && gChainFishingStreak < MAX_CHAIN_FISHING_STREAK) ++ gChainFishingStreak++; ++ else ++ gChainFishingStreak = 0; //reeling in different species resets chain fish counter ++ ++ sLastFishingSpecies = species; + IncrementGameStat(GAME_STAT_FISHING_CAPTURES); + SetPokemonAnglerSpecies(species); + BattleSetup_StartWildBattle(); +``` +**4.** Reset the chain counter +- Open [src/battle_main.c](../blob/master/src/battle_main.c) +- - add `#include "wild_encounter.h"` to the top +- - find the function, `FreeResetData_ReturnToOvOrDoEvolutions` and change to the following: +```diff + if (!gPaletteFade.active) + { ++ gIsFishingEncounter = FALSE; + ResetSpriteData(); + //etc +``` +- Open [src/field_player_avatar.c](../blob/master/src/field_player_avatar.c) +- - At the top of the functions `Fishing_NotEvenNibble` and `Fishing_GotAway`, add the following: +```c +gChainFishingStreak = 0; +``` +- Open [src/fieldmap.c](../blob/master/src/fieldmap.c) +- - add `#include "wild_encounter.h"` to the top +- - find the function `InitMap` and add the following to the top to reset when the player changes maps +```c +gChainFishingStreak = 0; +``` +**5.** Increase the shiny rate +- Open [src/pokemon.c](../blob/master/src/pokemon.c) +- add `#include "wild_encounter.h"` to the top +- Find the function `CreateBoxMon` +- define `u32 shinyValue;` at the top +- remove Line 2207, `SetBoxMonData(boxMon, MON_DATA_PERSONALITY, &personality);` +- edit the personality generation section underneath `else //Player is the OT` to: +```diff + else //Player is the OT + { ++ u32 rolls = 0; ++ u32 shinyRolls = 0; + + value = gSaveBlock2Ptr->playerTrainerId[0] + | (gSaveBlock2Ptr->playerTrainerId[1] << 8) + | (gSaveBlock2Ptr->playerTrainerId[2] << 16) + | (gSaveBlock2Ptr->playerTrainerId[3] << 24); + ++ #ifdef ITEM_SHINY_CHARM ++ if (CheckBagHasItem(ITEM_SHINY_CHARM, 1)) ++ shinyRolls += 3; //if you have the shiny charm, add 3 more rolls ++ #endif ++ ++ if (gIsFishingEncounter) ++ shinyRolls += 1 + 2 * gChainFishingStreak; //1 + 2 rolls per streak count. max 41 ++ ++ if (shinyRolls) ++ { ++ do { ++ personality = Random32(); ++ shinyValue = HIHALF(value) ^ LOHALF(value) ^ HIHALF(personality) ^ LOHALF(personality); ++ rolls++; ++ } while (shinyValue >= SHINY_ODDS && rolls < shinyRolls); + } + } + ++ SetBoxMonData(boxMon, MON_DATA_PERSONALITY, &personality); + SetBoxMonData(boxMon, MON_DATA_OT_ID, &value); + //etc... +``` |