New Features

Features intentionally added beyond the original Pokémon Red, Blue, and Yellow games:

Survey zoom with connected-map rendering and configurable void fill
Perspective tilt mode for an HD-2D-style overworld
Multiple color modes, including original, SGB, advanced GBC, monochrome, and classic green
Optional GBC screen effects, including pixel grids, shadows, glare, and transparency
Performance presets and configurable FPS limits
Peer-to-peer link play for trades and battles between Red, Blue, and Yellow
Persistent custom options stored separately from game saves
Optional widescreen battle layout
Mobile touch controls with editable layouts, vibration, and orientation settings
Screen position setting (center, upper, top) shared across all games, for clamp-on controllers that cover the lower screen
Touch skins in RetroArch overlay format and Delta .deltaskin (including PDF-wrapped bezel art), with per-button press states and Super Game Boy borders
Pokédex diploma and printer image exports

Gen 2 Specifics

Pokémon Silver as an importable, launcher-selectable version alongside Gold
Mod manager with Gen 1 mod adapters, per-game targeting, and modkit gen2check
Followers for mods, plus Gen 2-only registries and hooks