I hate how people always say missingno is a pokemon created by a glitch, when it is mostly game freak forgetting to insert wild data:p. (yes, i have seen the rare candies one, but that's just weird) But anyways, that is a pretty different idea. A hack where missingno actually has a purpose, besides being a place holder. Pretty cool.:D
For vm's to work, you have to reply on the other persons profile or in the convo itself.:p
I personally use VBA for my purposes. I can't help you with roms due to legality issues (though, there is no chance for Nintendo or game freak to make money off of a purchase since only second hand stores sell gba games anyways, so it really shouldn't matter, but whatever). I recommend the Ruby Destiny series, Flora Sky, and Snakewood (it has a lot of tile glitches, but if you like zombies and stuff, it's great enough to be able to ignore them). Those are the only ones I have right now, however sienna looks very good also. Great graphics in that one.
You're quite welcome. I recently gained interest in ROM hacks and generally getting back into Pokemon. Currently I've been shopping around for my first one to try (might be Dark Rising) and trying to figure out a low-risk way of getting an emulator and a PC Pokemon game. I suspect many sources could be virus-prone. But I'm just guessing.