SD Gundam: Scad Hammers is a Gundam title for the Wii in which players control a mech unit equipped with a giant hammer. It has been released in Japan.
Playable Mobile Suits:
RX-78-2 Gundam [Magnet Coating]
RX-78-3 Gundam "G-3"
RX-78 NT-1 ALEX
WD-M01 Turn A Gundam
Source: Wikipedia, "SD Gundam: Scad Hammers", available under the CC-BY-SA License.