Uploaded May 2023 | Updated September 2026, 10 hours ago

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Today we use #mariobros 3 to demonstrate how to easily create your own #gamegenie codes from scratch!
So you can independently start to create your own #retrogaming #cheats

Chapters:
00:00 Intro
00:30 Bumper
00:35 What are we going to do?
01:01 How does a Game Genie Work?
01:48 Going in depth about the control byte
02:38 How did we reverse engineer codes in the 90s?
03:26 How do we reverse engineer codes now?
04:06 Starting the hack
04:17 Getting the memory address for the lives
05:20 Using the debugger to find where the address is used
06:11 What are we going to change the code into?
07:17 Getting the machine code instruction for INC address,X
07:49 Trying the 1 byte hack wit the cheat menu
09:13 Getting the address for Mario's size
10:37 Testing assumption by changing Mario immediately
11:38 What are we going to change the code into, to remain BIG
11:59 Testing the code with the Cheat Menu
12:35 Generating the Game Genie codes using our Zig tool
13:13 Testing our codes on the NES
15:19 Ray shows his final wish from the Game Genie
15:24 Outro