Both JTAG and SPI programmers can be used to update the Consolizer’s firmware. The *.MCS firmware file is used for JTAG programmers and the *.BIN file is used for SPI programmers. Details of how to use specific programming devices is not covered here, the user should consult their programming devices user guide.
Citurs3000psi made a vid on how to do the GCDual firmware and it’s the same for GBAConsolizer!