Ultimate Mortal Kombat review at IGN.

"Ultimate Mortal Kombat. The name suggests that the game's something special, something in-depth, something all-encompassing, what with "ultimate" in the title. In reality Ultimate Mortal Kombat is simply a truncation of the title "Ultimate Mortal Kombat 3," the version of the arcade game that capped off the fighting series' use of 2D gameplay mechanics and digitized actors. It's not the "ultimate" in Mortal Kombat by any means - that arguably could go to the 1996 mash-up release of Mortal Kombat Trilogy. But this is an arcade emulation of Ultimate Mortal Kombat 3 for the Nintendo DS, and a really good one. To spice things up, the company also converted the satirical puzzle game Puzzle Kombat created for Mortal Kombat Deception, and then went one step further and made all versions fully playable over the Nintendo Wi-Fi Connection service. Not "ultimate" by any means, but certainly worthwhile."

Full Source: IGN