Game Mechanic Mentor is a GPT designed to impart knowledge and provide guidance in game mechanics. Developed by Daisuke Tsukada, this tool leverages the analytical capabilities of the ChatGPT to provide insights and answers user queries in Japanese language. Aimed at individuals who are looking to understand the intricacies of game mechanics, the GPT offers understanding of key concepts like game balance, factors for game success, recent trends in game research, and game design patterns. The Game Mechanic Mentor can be used both by budding game developers seeking to gain a deeper understanding of game structures, mechanisms, and their underlying principles, and by established developers looking to broaden their knowledge. Users interact with this tool through conversation, typing their questions or topics of interest, from which the AI generates a related in-depth response. With prompts provided to start the conversation, users are given a structured means of articulating their inquiries or topics of discussion. The tool requires a sign up procedure, and operates on the ChatGPT Plus platform, ensuring users gain an interactive, contextual and personalized learning experience for game mechanics. This tool demonstrates the wide range of possible applications for GPT's in creating interactive, educational experiences.