does the company make games for them at least? i remember a loooong time ago i got some sort of knock off gameboy and they made a few games for it (they sucked though)
They usually don't release any more games, no. They'll have somewhere between 5 and 100+ games built in or on bundled carts, and then that's your lot. Some recent models have an SD slot and you can download more games from the manufacturer's website though.
My Dad likes spending bugger all for Christmas presents on everyone. He bought one of these for my step-sister and it was broken. He got it from a catalog so had to send it back. Needless to say, it's not a Wii. It has games pre-installed on it and no room to put any more in.