Pokémon Yellow predefined functions list: Difference between revisions

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Line 1: This is a list of {{Y}} predefined functions. All values are in [[hexadecimal]]. ~~Pokemon Yellow Defined Functions~~ Some values that are stated "Nonfunctional" and "Softlock" may do something when certain conditions are met~~, but I'm lazy, so..~~.▼ ~~Research by Yeniaul~~ ~~yeniaul48<at>gmail<dot>com~~ ==Executing predefined functions== ~~All values in hex!~~ ===Hacked ROM=== Predefined functions can be executed with [https://forums.glitchcity.info/index.php?action=profile;u=1199 TheZZAZZGlitch]'s debug Pokémon Yellow by using the "Debug" item (known as "31337" in earlier ROMs), which can be withdrawn from the player's PC at the beginning of the game or added as item 1 with the [[GameShark]] code 012C1DD3. ▲Some values that are stated "Nonfunctional" may do something when certain conditions are met, but I'm lazy, so... ~~----~~ In at least the latest revision, one must use the debug item, select "Miscellaneous", scroll down to "Predef [7 heal]", adjust the value with right (ID +01h) and/or left (ID+10h) and press A to run the predefined function. ==List of predefined functions== 00: Shows in-battle HUD for exactly 5 frames 01 - 03: Nonfunctional 04: Writes random garbage to tile graphics,. ~~gameplay~~Effect ~~unaffected~~is cosmetic. 05 - 06: Nonfunctional Line 31 ⟶ 30: 0D - 0E: Softlock 0F: Initialises Player Data (Party, items, badges only) ~~0F: Faux New Game (all boxes and party Pokemon removed, items removed, badges removed, but no trainers or gyms reset. Curious.)~~ 10 - 17: Nonfunctional 18: ~~Faux~~Initialises ~~New~~Player ~~Game~~Data 19 - 1A: Nonfunctional Line 59 ⟶ 58: 29: Pokedex menu 2A ~~- 2B~~: Nonfunctional 2B: Saves the game to SRAM0 2C: Battle start, works Line 65 ⟶ 66: 2D: Nonfunctional 2E: ~~Some~~Draws ~~sort~~the of8 ~~squares flash~~badges on the ~~bottom~~Trainer ~~of the screen~~menu for ~~exactly~~ 5 frames (~~Needs~~uses the tileset of the loaded ~~investigation.~~map) 2F: Trade, nonfunctional 30: ~~Graphic~~Plays ~~for trainer~~the battle ~~start, nonfunctional~~transition 31: Small amounts of tile corruption, text to be specific. 32: Plays the Intro. Returns to the overworld when finished, but does not reload graphics. Any NPCs onscreen will show on-screen during intro. ~~32: Intro and title, then graphical errors (It's actually an overlay...? No actual reset occurs, just the graphics. It dumps control back to the player, so the map graphics get screwed up.)~~ 33: Nonfunctional 34: Flashes the screen indefinitely. ~~34: Battle flashing. (No black, just flashing.)~~ 35: Nonfunctional Line 89 ⟶ 90: 39 - 3A: Nonfunctional 3B: All tiles and sound filled with garbage. 3C: Cut, working Line 115 ⟶ 116: 4B: Nonfunctional 4C: Displays Emotion Bubble. Replaces text tiles 2, 3, 4, and 5 with "Trainer spotted you!" bubble. 4D: Nonfunctional Line 123 ⟶ 124: 4F: Softlock 50: Saves to SRAM2 50 - 51: Nonfunctional▼ ▲~~50 -~~ 51: Nonfunctional 52: Goes to a white screen and forcibly loads the save file, gives "file data is destroyed!" message if one does not exist. Pokemon and item data is loaded correctly however the tileset for the map is not changed if the save was in a different map. ~~52: Writes black to entire screen, graphical only~~ 53: ~~Nonfunctional~~Saves to SRAM1 54: "Wanna trade CLEFAIRY for MR.MIME?" 55: Enter Hall of Fame, then credits. Works, but ~~screws~~then updumps ~~all~~you ~~menus~~back into whatever state you were in before calling. Does not reload graphics. 56: Professor Oak's Rating Line 143 ⟶ 146: 5C - 60: Nonfunctional 61: Elevator menu with invalid floors. The menu may display mart items. If inside an Elevator after selecting an option, the elevator will move after exiting the menu but you will exit to a glitched map. ~~61: Elevator menu~~ 62: If you caught 0 kinds of pokemon, get item 0x00. Line 177 ⟶ 180: A1: Softlock A2: "[]5 error." where [] = tile 25 A3 - A5: Softlock Line 191 ⟶ 194: AA: Nonfunctional AB: Battle HUD appears, then "It's not very effective..." appears AC: See 92 Line 199 ⟶ 202: AE: Nonfunctional AF: 3TRAINERPOKe (that always turns into a Rhydon, not due to the [[Rhydon trap]]) was caught! B0: Text scramble, then crash Line 207 ⟶ 210: B6: Pops all text boxes B7 - FF: Softlock/Nonfunctional [[Category:Databases]]