Emerald hack: Pokémon: Weather Mayhem

[CannonsCreative]

The Hoenn Region isn't taking climate change too well. How will 16 drastic weathers changing at the end of each turn impact your play?
Be careful, these are stronger than Heavy Rain and Harsh Sunlight!
Commissioned by TCNick3 for Twitch and Youtube


How to play (2 different methods)
1. Download the patch and apply it to a clean Pokemon Emerald (U) (Trashman) rom:
https://drive.google.com/file/d/1y1XM5W19KG8HolGUN7gUBEiMBgJa2sNI/view?usp=sharing

2. Download the source code and build it yourself:
https://github.com/skaternutko/weather-mayhem/tree/more-weather

mGBA is the recommended emulator
Pokedex and Encounter Tables: Weather Mayhem Master Spreadsheet​

Gameplay Changes:

• 11 Additional weathers for a total of 16
  • Harsh Sun
  • Monsoon
  • Sandstorm
  • Hailstorm
  • Lightning Storm
  • Earthquake
  • Ether Storm
  • Pollen Storm
  • Tornado
  • Regular Day
  • Humid
  • Fog
  • Lunar Eclipse
  • Acid Rain
  • Rainbow
  • Solar Flare
• At the start of battle and the end of each turn, a new weather is randomly selected.
• Expanded regional dex to include Pokemon up to Gen IX for a full regional dex of 352
• Mechanics and features from pokeemerald-expansion, notable ones listed here
  • Updated battle mechanics to Gen IX, including ability, move, type, and stat updates.
  • Pokemon have movesets updated to the most recent game featuring them.
  • Multiple debug menus available for cheating in items, altering stats mid battle, and a battle sprite viewer for looking at the new Castform Forms.

Spoiler: Screenshots

Screenshots:

​

Spoiler: Weather Details

Weather Details:

• Modifications to all weathers to make them more "dangerous", plus 11 new weathers.
  • Harsh Sun:
    • Fire-Type move damage is boosted 2.5x
    • Water-Type and Ice-Type moves have no effect
    • Non Fire-Type Pokemon take 1/16 damage at end of turn
  • Monsoon (Rain):
    • Water-Type move damage is boosted 2.5x
    • Fire-Type moves have no effect
    • Electric-Type Pokemon speed is boosted 2x
    • Flying-Type Pokemon accuracy is boosted 2x
  • Sandstorm:
    • Non Rock-Type, Ground-Type, and Steel-Type move accuracy is cut 50%
    • Non Rock-Type, Ground-Type, and Steel-Type Pokemon take 1/16 damage at end of turn
  • Hailstorm:
    • Non Ice-Type Pokemon take 1/4 damage at end of turn
  • Lightning Storm:
    • Non Electric-Type Pokemon are Paralyzed at end of turn
  • Earthquake:
    • Non Ground-Type and Flying-Type Pokemon take 1/8 damage at end of turn
  • Ether Storm:
    • Psychic-Type move damage is boosted 2.5x
    • Fighting-Type and Poison-Type moves have no effect
    • Normal-Type move damage is cut 50%
  • Pollen Storm:
    • Grass-Type move damage is boosted 2.5x
    • Bug-Type Pokemon speed is cut 50%
    • Non Grass-Type Pokemon take 1/16 damage at end of turn
  • Tornado:
    • Flying-Type moves have double accuracy
    • Non Flying-Type Pokemon accuracy is cut 50%
  • Regular Day
    • Normal-Type moves damage is boosted 10x
  • Humid:
    • Bug-Type move damage is boosted 2.5x
    • Non Bug-Type Pokemon take 1/16 damage at end of turn
  • Fog:
    • Psychic-Type move damage is cut 50%
    • Ghost-Type Pokemon speed is boosted 2x
    • Non Ghost-Type Pokemon accuracy is cut 50%
  • Lunar Eclipse:
    • Dark-Type move damage is boosted 2.5x
  • Acid Rain:
    • Grass-Type and Steel-Type Pokemon take 2x more damage
    • Non Poison-Type Pokemon are Poisoned at end of turn
  • Rainbow:
    • Fairy-Type move damage is boosted 2.5x
    • Dark-Type and Dragon-Type moves have no effect
  • Solar Flare:
    • Dragon-Type move damage is boosted 2.5x
    • Normal-Type move damage is cut 50%
• All other weather mechanics set in the game already have been left unchanged (I.E. Swift Swim still works in Monsoon/Rain, Blizzard is a sure hit in Hailstorm, Sandstorm boosting special defense of rock-types, etc

Spoiler: Balance Changes

Balance Changes:

• An Exp Share that can be turned on at Pokemon Centers
• All Evolutionary items found in Lavaridge Herb Shop
• Evolutionary Changes
  • Larvesta -> Volcarona @ lvl 42
  • Dreepy -> Drakloak @ lvl 42
  • Drakloak -> Dragapult @ lvl 54
  • Deino -> Zweilous @ lvl 42
  • Zweilous -> Hydreigon @ lvl 54

Spoiler: Known Bugs/Fixes/Changes to be made

Known Bugs/Fixes/Changes to be made:

• Castform Specific
  • Castform changes to the next weather form before the weather states to be changing. (Has no mechanical implication)
  • Castform does not change to new form on switch-in if it's a new weather added
  • New Castform forms all use the normal castform as Box/Party sprite
  • New Castform form shinies are not properly implemented
• Weather Ball in new weathers do not have a graphical difference. They call the corresponding type for the weather, so it mechanically works as intended
• Enemy AI does not take new weather effects into action selection calculations. (This will probably stay unchanged because it's really funny)

Credits:

• TCNick3 - Weather mechanic design
• RHH - pokeemerald-expansion project to build off of
• MirPebble - Castform form sprite work
• Huderlem - poryscript and porymap to edit overworld objects and events

Discussion about updates and questions about Pokemon: Weather Mayhem can be talked about in Cannons' Creative server: https://discord.gg/kruZZH5SpC

 

[RickOfTheDarkness]

I laughed so much at the dark move used during a rainbow iteration text 🤣

 

[Fridge_Slamer]

I laughed so much at the dark move used during a rainbow iteration text 🤣

HOMOPHOBIA DETECTED ☠️

 

[GhostDarkShedinja]

Is this emerald map? I'm looking for a hack to play but got tired of Hoenn