"The corrupt bro dances across the NAND, thirteen bytes past the checksum, and the save never knows." 💩

Software Developer & Reverse Engineer

• Designing creature stats, abilities, and type-chart balancing for ROM hacks 📊
• Developing native save editors and homebrew for Nintendo Switch 🎮
• Reverse engineering game save formats and file structures 🕵️‍♂️
• Building local, privacy-focused AI modules (A.X.I.O.M.) 🧠
• Creating low-level system diagnostic and repair tools 💻
• Shipping zero-dependency open-source developer tools & network analysis utilities 🧰

• ⭐ Fallout: Evolution - Fallout-themed Pokémon ROM hack (pokeemerald-expansion) led by abelardthebard. Contributing creature design, BST/stat balancing, lore-to-mechanics ability mapping, and type-chart optimization. Currently locking in the early-game batch (Dogmeat starter branches, Mutant Hound lines, and lore-accurate abilities). 🦴
• ⭐ TimeStranger-NX - Digimon Story: Time Stranger Save Editor. Direct NAND FS access successfully implemented (no bridge required!). Currently adding advanced features before public release. 💩
• ⭐ PKHeX-NX - Native Pokémon SV Save Editor. v0.9.5 LIVE! 🚀| Community Discord coming soon. 🔴⚪
• ⭐ ACNH-Save-Editor - Shipped v1.4.0; currently developing the v1.5.0 Room Decorations Injector. 🍃
• A.X.I.O.M. v2 - Autonomous Local AI OS | Uncensored Dungeon Master (persistent world state, combat, lore RAG), Brutal Interview Simulator, and PC Diagnostic Agent (runs offline via Ollama/ChromaDB) 🐉💻
• Creature_AI_Prototype - Multi-agent ecosystem simulation with persistent individual minds, emergent social dynamics, elected governance, and task delegation 🐾
• All-in-One Tech Tools - Bootable USB app for computer diagnosis & repair (In development, release TBD) 🛠️

Currently in active development: The first native Switch save editor for Digimon Story: Time Stranger. Successfully achieved direct NAND injection (no bridge required!). Building out advanced features before public release.

🔬 Reverse Engineering Highlights:

• Located Yen value at offset 0x7973 (u32 little-endian) in /savedata/0001.bin
• Discovered the fsFsCommit() requirement to prevent silent NAND rollbacks
• Built custom hex-scanners to diff save dumps and locate offsets/checksums automatically

Public Beta & actively hardening: A 100% native Switch save editor for Pokémon Scarlet & Violet — built with open-source C++, byte-verified backups, and dual-file commit safety. — no PC, no save dumping, no bridges. v0.9.5 QoL sprint live; 279+ downloads, contributing to the 1,800+ total served across all projects.

🔬 Reverse Engineering Highlights:

• Cracked the Gen 9 SCBlock/SCXorShift32 save structure with SHA256 footer verification and xorpad decryption
• Ported the PKHeX SpeciesConverter to fix the Paldean ID divergence (Tarountula #917+ now display correctly, eliminating the "Dunsparce imposter" bug)
• Built a legality-aware generator: real abilities, manual legal move picker (pulled from real learnsets), growth-correct EXP across all 6 curves, and a 26-ball picker with correct in-game IDs
• Implemented the byte-verified backup + dual-file commit safety pipeline, alongside boot-time crypto sanity checks, SD space validation, and hard Applet-mode memory guards

📖 GameBrew Wiki

💬 GBATemp Release Thread

Shipped & stable: The first 100% native Switch save editor for Animal Crossing: New Horizons — no PC, no save dumping, no bridges. v1.4.0 live; 1,536+ downloads served (1.2k GitHub + 336 GameBanana), contributing to the 1,800+ total across all projects. v1.5.0 Room Decorations Injector in active development.

🔬 Reverse Engineering Highlights:

• Cracked the AES-encrypted economy integers (Wallet, Bank, Nook Miles, Loan) split across personal.dat (per-resident) and main.dat (per-island)
• Implemented automatic Murmur3 hash healing so edited saves pass the game's integrity checks on first boot
• Mapped the pocket item table: 8-byte slot records at offset 0x2A00 under /Villager0/, powered by a 13,000+ item-name database with native keyboard search
• Built the byte-verified backup + dual-file commit safety pipeline (auto SD backup before every NAND write, one-tap ZL rollback) — 1,000+ installs, zero lost saves

📖 GameBrew Wiki

💬 GBATemp Release Thread

See what the community and collaborators are saying about my work in TESTIMONIALS.md.

"Your Phase 0 feedback helped us catch exactly the kind of portability issues we wanted to eliminate."
— akino-nanto, flamoris-ai-agent maintainer (on PR #20, which merged the refactor my Phase 0 testing triggered)

"I told my niece I corrupted her island... she dubbed you 'Corrupt Bro'. Restoring the Zelda save sounds complicated so I think I'm going to stop but I'm happy the switch is working again. Again, you're an awesome person for taking the time to help me troubleshoot."
— igomhn3, ACNH-Save-Editor User (after a successful NAND rescue! 😎) (shared with permission)

"Thanks for the heads up on the dvr patches. I don't have any reason to update my emummc right now but when I do update it and my games crash, I'll know why"
— SwellEquis, r/SwitchPirates (after the am/0x23 crash-screen decode — preventative harm reduction working in the wild)

"Can someone please bring native PKHeX on switch with support for all gens... You got all my support my friend!"
— z-shark, Homebrew Community Member (After seeing my ACNH editor, they confirmed native PKHeX-NX was exactly what the community needed)

Left: Resume Parser + Brutal Interview Simulator | Right: Job Hunt Kanban Tracker

D&D Mode with Grit Level slider, Character Creation & Campaign Management

A.X.I.O.M. ingests the official D&D 5e SRD via ChromaDB for accurate rule-based narration

Features:

• 🐉 Uncensored Dungeon Master — Persistent world state, combat tracking, lore RAG, session chronicles
• 💼 Brutal Interview Simulator — Realistic hiring manager persona with scored feedback
• 📄 Resume Parser & Job Hunter — PDF parsing, automated job search, cover letter generation
• 🛠️ PC Diagnostic Agent — Executes local PowerShell tools safely via permission gate
• 🧠 Fully Offline — Runs on Ollama + ChromaDB, zero data leaves your machine

Emergent colony governance with elected mayors, task delegation, and persistent creature relationships

Features:

• 🧠 Persistent Individual Minds — Each creature has unique memory, personality, and relationship maps
• 🏛️ Elected Governance — Dynamic mayor elections with leadership scores and task assignment
• 🤝 Social Dynamics — Creatures refuse tasks based on friendship levels, form alliances, and negotiate
• ⏱️ Time & Weather System — Day/night cycles, weather effects, and resource management

• r/SwitchPirates 23.0.0 Recovery Guide 23k+ views, 77+ shares, 41+ comment support thread; #1 post of all time on r/SwitchPirates; maintained with a public corrections log and maintainer-verified fixes (bth, hexkyz).
• GitProfileLens (Accessibility & Testing): Implemented keyboard-accessible copy feedback with aria-live announcements and robust clipboard error handling. Rewrote unit tests to exercise real production handlers, ensuring deterministic success/failure paths.
• Repo-Radar (Algorithmic Disambiguation): Fixed a semantic collision in recommendation ranking where the "homebrew" keyword falsely matched macOS brew taps instead of Nintendo Switch homebrew projects, preserving relevance for console dev profiles.
• flamoris-ai-agent (Phase 0 Validation & Architecture Impact): Independently executed the full local acceptance checklist for a runtime-agnostic local AI agent on Windows. Identified critical friction points (UTF-8 encoding traps, API provider mismatches) which directly influenced the maintainer's architectural refactor (PR #20) for a neutral, environment-driven setup flow.
• OpenNOW-Switch (Real Hardware QA): Conducted deep hardware acceptance testing on modded Switch. Isolated a DTLS stream negotiation hang, validated the upstream fix (PR #37), caught a critical global input regression that CI missed (preventing a broken stable release), isolated a session handoff crash in (PR #39), and held the QA block on the native-Switch implementation (PR #40) documenting the Seat Setup Step 3 lifecycle crash before merge.
• Dusklight (Release Engineering): Diagnosed a version mismatch between the .nro NACP metadata and the in-game menu (git describe --dirty). Proposed three distinct CMake/release pipeline solutions, drawing from direct experience shipping PKHeX-NX.

I leverage my deep expertise in reverse engineering, systems programming, and local AI architecture to help companies and developers solve complex technical challenges. I prioritize safety, transparency, and byte-verified integrity in every project.

Translating complex low-level concepts into actionable guides. Authored the #1 all-time r/SwitchPirates recovery guide (23k+ views) and contributed accessibility docs for GitProfileLens.

Finding edge cases CI misses. Focused on memory safety, crypto implementations, and Horizon OS crash-screen decoding. Caught critical regressions in OpenNOW-Switch and flamoris-ai-agent.

Building zero-dependency diagnostic agents. Created gh-network-scanner and the A.X.I.O.M. PC Diagnostic Agent for secure, offline workflows.

📩 Contact: For freelance inquiries, please reach out via email at christopherbrownii1993@gmail.com. For open-source collaboration, connect with me on Bluesky or open a GitHub Issue.

Shipped & live: A zero-dependency, safety-first CLI that maps your second-degree GitHub network to surface high-signal developers. Pure Python stdlib — no pip, no frameworks. Applies a strict Quality Gate to filter bots and mass-followers, then enriches survivors with repo-language data. This is the exact tool that recently surfaced and connected me with Switch homebrew legends (ClusterM, fincs, WinterMute) and local-AI architects, proving the zero-dependency, safety-first architecture in the wild.

• GBATemp
• GameBanana
• Reddit
• Bluesky

I build native Switch homebrew, zero-dependency save editors, and local-first AI systems. All my tools are open-source, safety-first, and byte-verified.

If you've benefited from my work—whether it's rescuing a corrupted island, editing Pokémon saves on your Switch, or exploring local AI architecture—your support helps me keep building tools you can trust.

⭐ Found this useful? Star my repos and follow my work!

Built with ❤️ and lots of coffee ☕