Mario.

The 3D Mario games are just incredible.

Zelda: OoT. There simply wasn't any other Zelda like it (or any game for that matter) and one would believe that they did this flawlessly. The vast world, excellent gameplay, tons of secrets, top notch graphics...Zelda transitioned best. They kept everything in tact while transferring to a 3D space.

Out of those choices, I find 3D GTAs to be most like 2D counterparts, so I think those transitioned best.

I knew the ninty stuff would get the vote cuz its vgchartz.

It has to be GTA. It went from a successful series to breaking records. It sspawned it's own genre.
I ain't a fan of the games but common sense screams gta.

You know many regard the jump of Mario to be the best, not just Nintendo fans. I say Metal Gear, but I wouldn't descredit Nintendo. Also Driver (Sandbox) existed before GTA III(sandbox) so it didn't really spawn its own genre. 

Sonic the Hedgehog

You joke, but I loved Megaman Legend! T_T

Hands down Gran Theft Auto...................

Satire? If only games like Sonic Adventure 1/2 and Sonic Colors existed, I may have included him in the poll but I can't in good conscience after playing Sonic 06 and seeing stuff like Sonic & The Secret Rings or Sonic Boom. *shudders*

I'll have to vote for Mario, Zelda and Final Fantasy. But why does FF has so few votes in the poll, FFVII is great.