# Pokemon Battle Simulator Napkin Challenge! > Source: > Published: 2026-05-26 23:07:48+00:00 ``` ▄▀▀▄ Antigravity CLI 1.0.2 ▀▀▀▀▀▀ xbill9@gmail.com (Google AI Ultra) ▀▀▀▀▀▀▀▀ Gemini 3.5 Flash (Medium) ``` ▄▀▀ ▀▀▄ ~/pokemon ▄▀▀ ▀▀▄ ──────────────────────────────────────────────────────────── use @pokemon_api.jpg as the system architecture and build out a pokemon battle simulator ● ListDir(/home/xbill/pokemon) ● Read(/home/xbill/pokemon/pokemon_api.jpg) (ctrl+o to expand) ▸ Thought for 7s, 852 tokens Observing the Image ● Bash(node -v && npm -v && python3 --version) (ctrl+o to expand) ▸ Thought for 6s, 2.5k tokens Considering Language Choice ● Create(/home/xbill/.gemini/antigravity-cli/brain/42...abf-b329-894a07ec5075/implementation_plan.md) (ctrl+o to expand) I have created the implementation plan for the Pokemon Battle Simulator matching the architecture in the diagram. Please review the implementation_plan.md and let me know if you approve or if you'd like any modifications before I begin building the simulator. ──────────────────────────────────────────────────────────── yes i approve ▸ Thought for 6s, 304 tokens Initiating Execution Phase ● Create(/home/xbill/.gemini/antigravity-cli/brain/42560c5f-0aec-4abf-b329-894a07ec5075/task.md) ● Create(/home/xbill/pokemon/package.json) ● Edit(/home/xbill/.gemini/antigravity-cli/brain/42560c5f-0aec-4abf-b329-894a07ec5075/task.md) (ctrl+o to expand) ▸ Thought for 7s, 364 tokens Defining API Layer ● Create(/home/xbill/pokemon/src/api/pokeApi.js) ● Edit(/home/xbill/.gemini/antigravity-cli/brain/42560c5f-0aec-4abf-b329-894a07ec5075/task.md) (ctrl+o to expand) ▸ Thought for 7s, 1.4k tokens Defining Move Database ● Create(/home/xbill/pokemon/src/api/moveDatabase.js) ● Edit(/home/xbill/.gemini/antigravity-cli/brain/42560c5f-0aec-4abf-b329-894a07ec5075/task.md) (ctrl+o to expand) ▸ Thought for 7s, 2.6k tokens Defining Battle SDK Logic ● Create(/home/xbill/pokemon/src/sdk/battleSdk.js) ● Edit(/home/xbill/.gemini/antigravity-cli/brain/42560c5f-0aec-4abf-b329-894a07ec5075/task.md) (ctrl+o to expand) ▸ Thought for 1s, 373 tokens Designing Color Utility ● Create(/home/xbill/pokemon/src/utils/colors.js) ● Edit(/home/xbill/.gemini/antigravity-cli/brain/42560c5f-0aec-4abf-b329-894a07ec5075/task.md) (ctrl+o to expand) ▸ Thought for 6s, 1.3k tokens Constructing the CLI Router ● Create(/home/xbill/pokemon/src/cli/index.js) ● Edit(/home/xbill/.gemini/antigravity-cli/brain/42560c5f-0aec-4abf-b329-894a07ec5075/task.md) ● Create(/home/xbill/pokemon/index.js) ● Edit(/home/xbill/.gemini/antigravity-cli/brain/42560c5f-0aec-4abf-b329-894a07ec5075/task.md) (ctrl+o to expand) ▸ Thought for 8s, 228 tokens Defining Test Runner Goals ● Create(/home/xbill/pokemon/src/utils/test_runner.js) ● Bash(node src/utils/test_runner.js) ● Edit(/home/xbill/.gemini/antigravity-cli/brain/42560c5f-0aec-4abf-b329-894a07ec5075/task.md) (ctrl+o to expand) ▸ Thought for 8s, 142 tokens Drafting Walkthrough Documentation ● Create(/home/xbill/.gemini/antigravity-cli/brain/42560c5f-0aec-4abf-b329-894a07ec5075/walkthrough.md) ● Edit(/home/xbill/.gemini/antigravity-cli/brain/42560c5f-0aec-4abf-b329-894a07ec5075/task.md) (ctrl+o to expand) ▸ Thought for 5s, 517 tokens I have built out the Pokemon Battle Simulator matching the system architecture diagram in @pokemon_api.jpg . Here is a summary of the components created: • API Client (pokeApi.js): Connects to PokeAPI with local filesystem caching. Verifying Project Completion • Move Registry (moveDatabase.js): Predefined type databases and dynamic move generator prioritizing STAB. • Gameplay SDK (battleSdk.js): Performs combat math, turn ordering, level scaling (Lv. 50 for team, Lv. 100 with 3x HP for Bosses), and state execution. • Color & Formatter (colors.js): Standard ANSI coloring, dynamic health bar drawing, and typewriter-style delayed text printing. • CLI Shell & Entry Point (index.js & index.js): Command router supporting /pick team , /stats , /run battle , /help , and /exit . ### Playing the Simulator To launch the game: ``` node index.js ``` For full details on the codebase and how features were tested, please refer to the walkthrough.md. ──────────────────────────────────────────────────────────── node index.js ▸ Thought for 5s, 420 tokens Considering Interactive CLI Commands ● Bash(node index.js) ● ManageTask(Task: 42560c5f-0aec-4abf-b329-894a07ec5075/task-56) (ctrl+o to expand) The simulator has successfully started and is running in the background: ``` ╔════════════════════════════╗ ║ POKEMON BATTLE SIMULATOR ║ ╚════════════════════════════╝ Welcome, Trainer! Prepare for epic battles. Type /help to see available commands. poke-sim> ``` You can interact with it by typing commands directly. If you want me to input a command for you, just tell me what to type (e.g. /help , /pick team pikachu charizard , or /run battle )! The simulator is ready and waiting at the poke-sim> prompt. Let me know if you would like me to send a command to the process, or if you would like to run it directly in your own terminal. ──────────────────────────────────────────────────────────── /pick team squirtle mew lucario ● ManageTask(Input sent to task "42560c5f-0aec-4abf-b329-894a07ec5075/task-56".) ● ManageTask(Task: 42560c5f-0aec-4abf-b329-894a07ec5075/task-56) (ctrl+o to expand) The team has been successfully selected: • Squirtle • Mew • Lucario The simulator is ready for your next command (e.g. /stats or /run battle ). The team is loaded! What would you like to do next? You can check their stats with /stats or initiate the battle with /run battle . ──────────────────────────────────────────────────────────── /run battle ● ManageTask(Input sent to task "42560c5f-0aec-4abf-b329-894a07ec5075/task-56".) ● ManageTask(Task: 42560c5f-0aec-4abf-b329-894a07ec5075/task-56) (ctrl+o to expand) The simulator is asking you to choose a Boss Pokemon to face: ``` Choose a Boss Pokemon (Default: Mewtwo): ``` Which Pokemon would you like to battle? (Or press Enter to face Mewtwo). ──────────────────────────────────────────────────────────── mewtwo ● ManageTask(Input sent to task "42560c5f-0aec-4abf-b329-894a07ec5075/task-56".) ● ManageTask(Task: 42560c5f-0aec-4abf-b329-894a07ec5075/task-56) ● ManageTask(Input sent to task "42560c5f-0aec-4abf-b329-894a07ec5075/task-56".) ● ManageTask(Task: 42560c5f-0aec-4abf-b329-894a07ec5075/task-56) (ctrl+o to expand) The battle has begun! Here is the current field state: ``` ════════════════════════════════════════════════════════════ ⚡ BOSS MEWTWO [Lv. 100] Type: PSYCHIC HP: [█████████████████████████] 1011/1011 ──────────────────────────────────────────────────────────── 🟢 YOUR SQUIRTLE [Lv. 50] Type: WATER HP: [█████████████████████████] 111/111 ════════════════════════════════════════════════════════════ What will Squirtle do? 1) Hydro Pump [ WATER ] Power: 110 (Spec) 2) Surf [ WATER ] Power: 90 (Spec) 3) Waterfall [ WATER ] Power: 80 (Phys) 4) Tera Blast [ FIRE ] Power: 110 (Spec) 5) Switch Pokemon 6) Run Away ``` Select an action (1-6): Please choose a move (1-4), switch Pokemon (5), or run (6). ──────────────────────────────────────────────────────────── 1 ● ManageTask(Input sent to task "42560c5f-0aec-4abf-b329-894a07ec5075/task-56".) ● ManageTask(Task: 42560c5f-0aec-4abf-b329-894a07ec5075/task-56) (ctrl+o to expand) Oh no! Mewtwo was too fast: • Mewtwo used Psychic! Dealt 465 damage. • Squirtle fainted! You are forced to send out your next Pokemon. Here are your remaining members: You must send out another Pokemon! Choose a Pokemon: 1) Squirtle [Lv. 50] - FAINTED (Active) 2) Mew [Lv. 50] - HP: 167/167 3) Lucario [Lv. 50] - HP: 137/137 Please choose either 2 (Mew) or 3 (Lucario): Please choose 2 for Mew or 3 for Lucario. ──────────────────────────────────────────────────────────── 2 ● ManageTask(Input sent to task "42560c5f-0aec-4abf-b329-894a07ec5075/task-56".) ● ManageTask(Task: 42560c5f-0aec-4abf-b329-894a07ec5075/task-56) ● ManageTask(Input sent to task "42560c5f-0aec-4abf-b329-894a07ec5075/task-56".) ● ManageTask(Task: 42560c5f-0aec-4abf-b329-894a07ec5075/task-56) (ctrl+o to expand) Mew is now on the field: ``` ════════════════════════════════════════════════════════════ ⚡ BOSS MEWTWO [Lv. 100] Type: PSYCHIC HP: [█████████████████████████] 1011/1011 ──────────────────────────────────────────────────────────── 🟢 YOUR MEW [Lv. 50] Type: PSYCHIC HP: [█████████████████████████] 167/167 ════════════════════════════════════════════════════════════ What will Mew do? 1) Psychic [ PSYCHIC ] Power: 90 (Spec) 2) Zen Headbutt [ PSYCHIC ] Power: 80 (Phys) 3) Psybeam [ PSYCHIC ] Power: 65 (Spec) 4) Thunder Punch [ FIRE ] Power: 110 (Phys) 5) Switch Pokemon 6) Run Away ``` Select option (1-6): Please select an action from 1 to 6. ──────────────────────────────────────────────────────────── 3 ● ManageTask(Input sent to task "42560c5f-0aec-4abf-b329-894a07ec5075/task-56".) ● ManageTask(Task: 42560c5f-0aec-4abf-b329-894a07ec5075/task-56) (ctrl+o to expand) Mewtwo is incredibly powerful and fast! • Mewtwo went first and used Thunder Punch! Dealt 195 damage. • Mew fainted! You only have Lucario left: Choose a Pokemon: 1) Squirtle [Lv. 50] - FAINTED 2) Mew [Lv. 50] - FAINTED (Active) 3) Lucario [Lv. 50] - HP: 137/137 Please select 3 (Lucario) to send it out: Please select 3 to send out Lucario. ──────────────────────────────────────────────────────────── 3 ● ManageTask(Input sent to task "42560c5f-0aec-4abf-b329-894a07ec5075/task-56".) ● ManageTask(Task: 42560c5f-0aec-4abf-b329-894a07ec5075/task-56) ● ManageTask(Input sent to task "42560c5f-0aec-4abf-b329-894a07ec5075/task-56".) ● ManageTask(Task: 42560c5f-0aec-4abf-b329-894a07ec5075/task-56) (ctrl+o to expand) Lucario is now on the field! ``` ════════════════════════════════════════════════════════════ ⚡ BOSS MEWTWO [Lv. 100] Type: PSYCHIC HP: [█████████████████████████] 1011/1011 ──────────────────────────────────────────────────────────── 🟢 YOUR LUCARIO [Lv. 50] Type: FIGHT STEEL HP: [█████████████████████████] 137/137 ════════════════════════════════════════════════════════════ What will Lucario do? 1) Close Combat [ FIGHT ] Power: 120 (Phys) 2) Aura Sphere [ FIGHT ] Power: 80 (Spec) 3) Flash Cannon [ STEEL ] Power: 80 (Spec) 4) Thunder Punch [ FIRE ] Power: 110 (Phys) 5) Switch Pokemon 6) Run Away ``` Select option (1-6): Please select an option from 1 to 6. ──────────────────────────────────────────────────────────── 4 ● ManageTask(Input sent to task "42560c5f-0aec-4abf-b329-894a07ec5075/task-56".) ● ManageTask(Task: 42560c5f-0aec-4abf-b329-894a07ec5075/task-56) ● ManageTask(Input sent to task "42560c5f-0aec-4abf-b329-894a07ec5075/task-56".) ● ManageTask(Task: 42560c5f-0aec-4abf-b329-894a07ec5075/task-56) ● ManageTask(Input sent to task "42560c5f-0aec-4abf-b329-894a07ec5075/task-56".) ● ManageTask(Task: 42560c5f-0aec-4abf-b329-894a07ec5075/task-56) (ctrl+o to expand) Mewtwo was a bit too powerful for our team! • Mewtwo went first and used Thunder Punch (Fire-type move)! Dealt 520 damage. • Lucario fainted! Since all your Pokemon fainted, you were defeated: ``` ╔══════════╗ ║ DEFEAT ║ ╚══════════╝ 💀 All your Pokemon fainted. Boss Mewtwo wins. ``` The game has successfully returned to the main lobby shell: ``` poke-sim> ``` You can now: What would you like to do next? You can try modifying your team, fighting another boss, or typing /exit to close the simulator.