what is the mini tweaker tool called?

in your best computer geek talk please tell me exactly (be specific so i know what to ask for) what the mini tweaker program is.

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SH3 Mini Tweaker is a simplified GUI program interface for changing general hex
game variables.
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ok i read that, but you google that and it only tells you to go read about it on subsim lol.

say i want to buy the program that does what it does, now what?

i don't believe its sold under the mini tweaker trademark so what program do i need to be able to make something like this? does it even exist out there or is it built from scratch specifically for sh3?