some new news on this TR (Tetris) Front...
a new variant (photo graphic verified) an upside down Brazil Gray Cart.
and now i will add the Alexey Pajitnov autographed cart.
there will be a new "variant" list for pcb posting soon.. keep an eye out for the list..
just some works that can be added here for easy ref...
my dmg rom variant list
RH's DMG list of label variants..
Splain's beat Every GB library
Brickman's Japan Retail GBC List
they only had 5 Robopon iirc.
sun, moon, start, bonbon, and the usa sun... they were KISS for CGB. i do know of one or two cgb regular KISS cart for the robopon.