A modernized Pokémon Yellow ROM hack with new mechanics, content, and quality-of-life improvements, while preserving the classic story and gameplay.
More in the latest release page
Major changes are in bold.
- Gym Leaders and League Rematches (with stronger Pokémon)
- More wild Pokémon variety (10 → 12 per area)
- New Pokémon sprites
- All 151 Pokémon are obtainable
- New battle HUD
- NES-style font
- Mew obtainable through easter egg
- Changed all trainer parties
- Rebalanced trainer and wild Pokémon levels (up to Lv. 85 for final rival)
- Move relearner and deleter
- New game modes: HARD and NUZLOCKE (can be combined)
- Brand new status screen inspired by Gen 2 (made from scratch by me)
- Changed all wild Pokémon and levels (mix of RBY)
- Changed all Pokémon trades and casino prizes
- All gym leaders and Elite Four have unique sprites and custom movesets
- Some new tilesets, sprites, fonts, palettes, etc.
- Scripted shiny Pokémon with properly randomized attack DVs (1 guaranteed; others in battle)
- Unique trainer names, class DVs, and Pokémon DVs
- Unique overworld Pokémon sprites
- Countless original bugs fixed
- Increased bag capacity to 50
- Item descriptions and box reminders
- Prompt to use CUT and SURF
- Metric system in Pokédex
- Switch Pokémon box without PC (SELECT while on "Pokémon" in pause menu)
- Starter Pikachu has maxed DVs
- "Press B to RUN" in wild battles
- Shop quantity adjustment with left/right
- Running shoes (press B)
- Reusable TMs
- Player gender
- Pokémon gender
- Shiny Pokémon (1/8192)
- Physical/Special split (with battle HUD icons)
- Gen 7+ critical chance mechanic (made from scratch by me)
- Unique Pokémon minisprites in party
- Special split into sp. atk/sp. def like Gen 2+ (still share 1 DV)
- Healing items, type effectiveness, moves, some move side effects updated to Gen 9
- No poison effect out of battle
- Updated Pokémon base stats, evolution moves, base EXP, catch rates to newer gens
- Item prices updated to Gen 9, selling items reduced (1/4 → 1/2), starting cash 5000
- Deposit Pokémon with HM moves in daycare
- Sleep mechanic from Gen 9, increased burn, poison, and leech seed damage (1/16 → 1/8)
(check commit history for full details)
This hack wouldn’t be possible without inspiration, code snippets, and tutorials from the community.
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Base ROM:
dannye/pokeyellow-gen-2-gfx -
Repos & Hacks that inspired or contributed code/snippets:
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Wiki & Tutorials:
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Adaptation & Integration:
Most of the code, mechanics, ideas, and features were adapted from the hacks and tutorials above and carefully integrated into this ROM. Some features and routines were made from scratch by myself, with the Gen 7–style critical hit mechanic being the main example. -
Sprites:
- 80c — for the Pokémon spritesheet (original link is no longer available)
- A few additional community-made sprites from various sources; if you recognize your work, please contact me for proper credit.
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Special thanks:
- The entire community for documentation, tools, and open-source resources