Welcome to the strategy forum. This is a place to make strategies and share them with other members of this wiki's community. To add a new topic, type the title. Cerulean Gym is the 10th Pokémon Tower Defense level and the 2nd Gym challenge in the game Strategy. Main article: Forum:Cerulean Gym. Hey everybody! Welcome to my quick playthrough of POKEMON TOWER DEFENSE! If you're reading this.