Hyren is correct, the 2/3DS range is region locked so each restore and console are only useable with one another.

The virtual console games range from about $5-$16 if memory serves and Metroid is well represented as is Kirby, donkey kong country etc. even Pokémon red/blue/yellow and silver/gold/(soon)crystal are on there too.

Only problem is that if you download virtual console games on one system and then get a new system you have to re buy the games all over again. Nintendo have been mooting the end of this archaic system for ears but are yet to deliver.