I've got some pokemon games with emulators if anyone wants them - link HERE if anyone want's them. (Download is at top of page, dotted underlined)
They don't all follow the normal storyline - and most have higher level enemies at gyms, elite 4 etc.
To play:
1) Download the above program.
2) Unzip.
3) Drag one of the '.GBA' files onto the 'Visual Boy Advance' program.
4) Happy pokemon-ing!
Iain.