I just had a question go through my head. How does one go about putting a homebrew game onto a cartridge? Do you use the same chip as the donor cart or has there been a new chip invented for the VB? Like for instance, my Game Gear Everdrive has a new chip that has “Everdrive” printed on it. I was wondering if the same is for the VB.

The ROM (read-only memory; so no, it can’t be reused) chip in the VB carts have non-standard pinouts, so there is no drop-in replacement. The custom chip in the Everdrive is likely either an FPGA (field-programmable gate array) or an ASIC (application-specific integrated circuit), neither of which would actually hold the game(s). They’re used to simulate a cart ROM while getting the data from the SD card (or some other flash memory). IIRC, this is exactly how the “VBSD” cartridge was going to work (and there may be a working prototype by know, for all I know).

TMK, all of the VB repros and custom carts have been pre-programmed FlashBoys without the USB port and possibly other programming-related circuitry installed (with the obvious exception of Hyper Fighting).