Pokemon Extreme Yellow ROM

Pokemon Extreme Yellow is a GB ROM Hack by Rainbow Metal Pigeon based on Pokemon Yellow. It was last updated on December 30, 2024.

Description

Pokemon Extreme Yellow is a difficulty romhack of Pokémon Yellow featuring much tougher battles; complex dungeons; restored content; more elaborated, deeper, and darker lore and story; completely new areas and story arcs; virtually infinite post-game content; a plethora of customization and randomization options.

Features/Changes

The driving principle of Extreme Yellow is to provide “Kanto at its max (and beyond!)”:

• all Pokémon-related to the original 151 via evolution, so pre-evo, evo, branched evo, etc (this comes with the introduction of the post-gen-1 types) for a grand total of beyond 200! This includes some surprises! More info to come!
• wider movepool with moves from more recent generations
• higher difficulty: all “named” trainers have a full team, with max Stats and DVs
• various new locations, including two new cities, secret areas, new buildings, etc
• two new story arches taking place in the middle of the main canon story
• multiple optional subquests
• selected trainers engage in Inverse Battles
• possibility to complete a Living Dex via enhancement of the encounter tables
• new items, like Heavy Ball and Fast Ball
• revisited and expanded the backstory and psychology of the main characters
• vast (virtually infinite) and challenging postgame, including rematches, new areas, new trainers, and more
• non-binary gender selection
• a plethora of QoL: improved move info box; improved Safari Zone experience; options for regulating level scaling, badge boost, and exp gaining; modern-like usage of field moves; portable PC, etc
• enhanced interaction with Pikachu: friendship plays a pivotal role and a new custom overworld Fly animation
• many Easter Eggs, references, and optional secrets

More changes (WARNING! CONTAINS SPOILERS!)

• Mega Evolution appears as permanent evolution in Extreme Yellow
• the Legendary Birds are unlocked after completing three special subquests
• an NPC that appears randomly in any city after besting the League, and is in search of the final member of their ultimate interdimensional team
• The author themself (yes, me!) makes an appearance as a fightable post-League boss
• the so-long-sought super fusion Venustoise is finally catchable
• Celadon Hotel has available rooms
• a whole new location, the Lunar Temple, will play a key role in the main plot
• Mt Moon has been expanded to be part again of the main plot with a new, much harder maze
• Stater Pikachu obedience is based on happiness rather than level and number of badges, and at high happiness it will gain extra power
• a Light Ball is hidden in the region, doubling the damage of the Starter Pikachu
• Pikachu can Surf and Fly, and it has custom animations and sprites
• possibility to surrender in trainer battles
• multiple rumors and urban legends have been merged to create the ultimate end-game maze…

Known Glitches

All of these are glitches I am aware of, that I want to fix but they are quite tough to deal with and cause no harm whatsoever to the gameplay:

• the intro page of the surfing minigame has a random unwanted tile
• after playing the surfing minigame, the surf enthusiast disappears. It re-appears upon exiting and re-entering the building
• when using the Portable PC, some tiles may be glitched, specifically the one representing the level of the Pokémon
• when using the Item Randomization option, the TMs available in the Marts will not correspond to the ones you picked up

Changelog

V1.4

• New option for gen-4-like physical/special split|
• New option for random evolutions: every Pokémon evolves into any other one at every level for maximum chaos and fun!
• New option for an updated battle GUI: you can now see BOTH the Pokémon level AND its status, and it distinguishes between normal and toxic Poison!

V1.3

• A bunch of bugfixes
• A highly requested QoL improvement: a Rare Candy, available from the beginning of the game, which can be used infinitely! Just throw it away if you want to play the game in the classic way, or use it at your heart’s content to ease up your grinding!

v1.2

• Fixed a bug that prevented Inverse Battles from being reset upon losing

Useful Links

Discord

Pokecommunity

Reddit

Github