COOL TOOLS
Small, single-purpose utilities I built because something annoyed me and nobody else had fixed it. They run entirely in your browser. No accounts, no uploads, no server.
Mario Tennis Save Patcher
Mario Tennis for Game Boy Color locks four characters and four minigames behind an N64, the N64 cartridge and a Transfer Pak. This patcher writes the exact same bytes a real Transfer Pak session writes, verified on a real cartridge, so you can unlock them from your save file alone.
YOSHI
WARIO
WALUIGI
BOWSER
+ 4 minigames
Yellow Legacy Save Editor
A save editor for Pokémon Yellow Legacy that runs in the browser instead of on Windows. Edit the trainer block — name, ID, money, Game Corner coins, gym badges and the towns Fly can reach — at the offsets the romhack actually uses, not the vanilla ones. The bank 1 checksum is recalculated on the way out.
Know some retro content locked behind hardware nobody owns anymore? Tell me. Reverse-engineering save formats is my kind of weekend.
YOUR BANK
Consider donating
If this tool, patch or work helped you, consider donating. It helps me keep the next build coming.
Any amount is fine. Everything here stays free either way.
Pix is Brazil only, it works through Brazilian banks. Outside Brazil, use Ko-fi below: any currency, any card.
erick.tmr@outlook.com
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