Multiple games at once.

[cainy]

Is it possible to play two games at once on one 3ds?

[InfiniteTrainer619]

Is it possible to play two games at once on one 3ds?

Yes. Using things like the R4i Flash Cart you can load multiple roms on to one card. If you're talking about actually playing to games at the same time, than no, not that I know of.

A link to a R4i Flash Cart with 3DS Support is seen here: http://www.r43ds.org/products/R4-3DS.html