What is the bug found by GPP?

 title: 'Comparison of Gemini 1.5 Pro and Gemini 2.5 Pro responses to image-to-SVG task.'

The Gemini Plays Pokémon (GPP) agent encountered a novel bug in the code of Pokémon Red/Blue[1]. According to the report, GPP is likely the first AI to find this bug in the game's code[1].

This occurred in the Seafoam Islands, which contain 5 floors involving multiple boulder puzzles[1]. These puzzles require the player to navigate mazes and push boulders through holes across multiple floors to block fast-moving currents preventing the player from using HM03 Surf in various locations in the dungeon[1].