Engine

[WhenGryphonsFly]

The objective of these expansions is not just to provide yet another source of common features, but to also consistently rebase feature branches on upstream.

Technical Changes

• expansion__boxpokemon
  • Reduce BoxPokemon size from 80 bytes to between 40 and 60 bytes based on #defines
  • Allow Deoxys to be in all four Formes in one game
  • Expand Met Location from 8 bits to 9 bits
• expansion__hardware
  • Allow saving and loading with defective/missing upper 64k of flash memory
  • Allow loading of corrupted sectors
  • Allow progression of RTC while game is running even with dead battery
• expansion__pokemonstorage
  • Remove recorded battle, trainer hill, and hall of fame save sections
  • Expand PokemonStorage to fill empty space
  • Determine number of allowed boxes dynamically
• expansion__saveblock
  • Remove encryption
  • Remove "DMA"
  • Remove filler
  • Merge SaveBlock2 and SaveBlock1
  • Change sector size from 3968 to 4080

Player-Facing Changes

• expansion__battle
  • Add AI improvements
  • Remove Freeze
  • Add Frostbite
  • Add double battle only mode
  • Add wild Legendary Pokémon buffs
• expansion__eightpokemon
  • Expand party size to eight pokemon (https://github.com/AstroBDev/8partyEmerald)
• expansion__items
  • Reorder items
  • Change flutes to key items
  • Remove unused items
  • Remove mail
  • Change Poké Balls available
  • Remove herbal medicine
  • Add Glitzer Pop (Remove all EVs)
  • Add X Sp. Def
  • Remove Incenses
  • Add Generation IV Power and Choice held items
  • Change TMs to be reusable
  • Scale Poké Marts with number of badges
  • Expand bag size
  • Rearrange bag pockets
  • Remove PC items
• expansion__openworld
  • Remove HM badge requirement
  • Scale wild Pokémon based on lead Pokémon's level (and other factors)
  • Scale gyms based on number of badges collected
  • Scale trainers based on the number of trainers defeated (i.e., if challenged by a Bird Keeper, instead of pulling up a specific team, pull up the easiest Bird Keeper that has not yet been defeated)
• expansion__overworld
  • Change to a dynamic overworld palette system (required for features listed below)
  • Expand number of allowed OWs from 255 to 65535 (https://github.com/ghoulslash/pokeemerald/tree/overworld-expansion)
  • Add overworld following Pokémon (https://github.com/TheXaman/pokeemerald/tree/overworld_pokemon386)
  • Add overworld day/night tints
• expansion__paceofplay
  • Add instant text option
  • Allow running/biking on all maps
  • Add B2W2+ Repel mechanics
  • Add additional registered items bound to L & R
• expansion__qol
  • Remove 100 EV limit for vitamins
  • Reduce single stat EV limit from 255 to 252
  • Merge Acro Bike and Mach Bike
  • Remove HM teaching requirement (still require a Pokémon capable of learning the HM)
  • Remove trade evolutions
  • Add optional disabling of (non-shiny) wild encounters
  • Add optional Exp. All with catch-up mechanic
  • Change encounter slot probabilities to be all equal
  • Change shiny rate from 1/8192 to 1/4096
  • Add IV/EV summary page

Not Strictly Engine Changes

• expansion__kanto?
  • Add Kanto locations
  • Add necessary engine differences from FireRed
• expansion__wallpapers?
  • Add new wallpapers (https://github.com/Greenphx9/pokeemerald/tree/wallpaper-expansion)