Well, the curent K101 + Plays GB Games, but unless the GBA Games which were played via the reverse enginered GBA Hardware Clone Board , it plays they via Emulation, and you cant put GB GBC Cardridges on the Device, they have to go to the Micro SD Card,
Also the GB GBC Emulators are from the GBA, so dont expect they to bee that acurate and fast like they vere from the Pandora..
Most Games Plays quite well, but some ditnt..
but mybe its better on the K2, because its DS Hardware, but i dotnt know..
Like i said bevore: the K101 plus is great for GBA Games, but i cant see why i should get a K2 when the Pyra is there who can play lots of emulators paralel at once..