Originally Posted by chiliDog
The Conduit is pretty good and Metroid Prime 3 Corruption is most excellent in my opinion.
edit -- Whoops, you said local multiplayer. Sorry. The only one I can think of is Quantum of Solace, which had terrible reviews so I never thought about getting it.
QoS got horrid reviews from crticis, but I have read where there are some Wii users that actually dig the game for their system - have never played it myself, but may rent it.
Metroid Prime Trilogy does include the multiplayer from MP2 Echoes - 4 players, local only. Not a great improvement over the local mulitplayer we saw in Goldeneye for N64, but it is what the OP is seeking. Granted, it is perhaps the lesser feature in an otherwise jam packed disc that any Wii owner that likes shooters or adventure/quest games needs to own.
While not true multiplayer, the last 2 Call of Duty games for Wii (World @ War, Modern Warfare Reflex) have "squadmate" mode in single player. A 2nd player can jump in w/ just a Wiimote and act as a 2nd shooter to the main player, who handles all the primary game actions. Will say that for online, Modern Warfare Reflex is actually very good - a better online shooter than the Conduit or even the previous COD for Wii.