I've found the Rogo rom and another version adapted for MSX2 that were made to put in an Eprom, so I though it was possible to use them with the Megaflashrom, but maybe you've tried yet and didn't work.
You need also DB9 interface to connect the cable to the RobotArm.
On original Rogo Cartridge there is 2x DB9 connectors where you plug cables to the RobotArm.
Ok... PErhaps you are thinking using the MSX joystick port ?
I don't think it can works...
But you can make yourself the cartridge...
Here the schematics (thanks to Jipe from MSX VILLAGE)