I'm not sure if I should put this in mod releases or anything similar, but, move if necessary.
Anyway, I have found a way to mute Jimmy's voice, but the file is too big to upload as a mod (Roughly 1GB), so I will provide instructions as opposed to a download.
Instructions:1. Make your way to Bully Scholarship Edition/Audio/Playlist
2. Back up your copy of Speech.bin! - This is a big file and if you lose it, you will need to reinstall Bully.
3. Open Speech.bin in a Hex Editor such as HxD Hex Editor
4. Press CTRL + H [CTRL + R in some cases] to open up the 'Replace' Window
5. Replace all instances of 'Jimmy' to something like 'Nimmy' (May take a while, there are over 18K instances if I remember correctly.
6. Done
Notes: 1. I have not tested it yet, but this may work on other students too. Just replace 'Jimmy' with the ped identifier, (which is usually their name) and replace it with something of the same length.
2. I tried changing 'Nimmy' to another existing student. It may have worked if it weren't for the fact that Jimmy's social voice files aren't the same name as the pedestrians' voice files.
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If you are using a custom skin, then this mod will be work in your favor!
Video:
Bully: Scholarship Edition Mod: Jimmy Muted