To arrest the decline in interest in Pokémon Go, Niantic should: 1) Enhance the gaming experience by customizing it based on users' habits, fitness levels, and preferences for trading or limited movement. 2) Partner with Google to make Maps and Calendar more integrated with Pokémon Go to remind users. 3) Discourage cheaters by degrading their level or giving temporary bans instead of permanent bans, and reward loyal users.