Worked on the SirzBenjie/pokerogue repository with a focus on maintenance and reliability, addressing a key bug affecting endgame move outcomes. Improved the handling of Roar and Whirlwind by ensuring accurate failure messaging when the opponent has only one Pokémon remaining, reducing user confusion and preserving game integrity. Utilized TypeScript for both the bug fix and the addition of automated unit tests, which now cover this specific edge case to prevent future regressions. Emphasized robust game development practices by implementing pre-checks before move execution, enhancing user experience and strengthening regression protection through improved test coverage and code quality.