Arcade software is notoriously sensitive to directory paths.
: Utilizing tools like SREP or LZMA to reduce file sizes for easier distribution of large arcade assets.
TeknoParrot itself is legal. It is a piece of software that interfaces with hardware. However, the includes copyrighted game dumps (ROMs/ISAs). These are the intellectual property of Sega, Bandai Namco, Konami, etc.
The popularity of these repacks stems from several distinct advantages over a standard TeknoParrot setup: