During December 2025, John Tebbe enhanced the rh-hideout/pokeemerald-expansion repository by implementing new classification flags for Pokémon species, specifically distinguishing restricted legendary from sub-legendary categories. He approached this by introducing dedicated .isRestricted and .isSubLegendary fields within the existing C codebase, leveraging data structures to enable more granular gameplay rules and future analytics. The work focused on backward-compatible integration, ensuring maintainability and minimal disruption to existing features. Utilizing C programming and game development principles, John’s contribution improved species management and balance tuning, demonstrating careful data modeling and disciplined version control without introducing bugs or requiring major changes to legacy code.