OH I talked to the developer they designed their flashcarts to only hold one game at a time.. YOu need a secondary flasher device to do the flashing/backups. They have chosen to do it this way to keep costs down, and not have to directly compete against bigger companies like Krikkz.
But it also has the advantage of being able to have full access to linked features like Pokepark on GBA and Nintendo DS pokemon games, and when using a transfer pak on n64 for example.
These were things that the demographic they market too want in a flashcart. Maybe buy more than one even, to have copies of rare/patched games in their collections as stand-alone repros...
Still I'm strongly interested in the rumble/RTC flashcart they have for testing rumble based games on the Gameboy Color.
And maybe one of those GBA solar sensor packs for Boktai 3 (which I'd probably leave on it, and never change). He said one feature of their solar sensor is that it can work off ambient light like a lamp if you want to, if there is no accessible sun, good weather....