I am going to spend a month with my grand parents, and my cousins, and I was planning on taking my Wii with me. I also want to take as many multiplayer games as I can, but looking at my list of games at the moment, I can't really decide.

Games I am taking:

Super smash brother's brawl
Mario Kart Wii
Wii sports
Mario Party

Can someone give me some more suggestions for fun multiplayer games to rent and bring to my Grand Parent's house?

I also really wanted to bring a shooting game, but I don't really have any good ones at the moment. Please suggest one that has fun multiplayer!

Super Mario Strikers Charged
Mario and Sonic at the Olympic Games
Red Steel
Excite Truck
Excite Bots
Dragonball Z: Budokai Tenkaichi 2/3
Pokemon Battle Revolution
Boom Blox
Boom Blox: Bash Party

I'm guessing they don't have any wireless internet do they? If so then get The Conduit. It's a fun shooter with online multiplayer, but no multiplayer on the console like with Mario Kart or Smash Bros.

Does the Conduit have offline multiplayer?

No, it doesn't, and that makes me sad.

Yeah me too. I guess the reason is that it already struggles with the framerate at times and splitting that up would cripple it. It's probably better this way.