Pokémon GO's success can be attributed to the scalability of its Pokémon Trainer Club system, which utilized Couchbase Server Enterprise Edition to support millions of users. The choice of NoSQL database allowed for rapid scaling and adaptability, with features like Multi-Dimensional Scaling (MDS) and memory-optimized indexes enabling administrators to isolate and scale discrete services. The team's commitment to support and professional services ensured a smooth launch and resolution of performance issues, with 24/7 support engineers working to resolve problems quickly. By leveraging Couchbase Server's capabilities, The Pokémon Company International was able to manage the growth of its infrastructure incrementally, on demand, and as needed, ultimately supporting the massive user base of the game.