Hello everyone! I've decided to upgrade my Wii library, now in its later life cycle, and I'm always seeking for some local multiplayer games to play with friends. Could you suggest me some maybe less known title to look for, also on wiiware?

Keep in mind I already know or own: NSMBW; SSBB; MKW; Wii sports resort; Wii party; Mario Party 9; Just Dance; Guitar/DJ hero; Boom Blox Bash Party; Mario & Sonic at the olympics; Goldeneye 007

Is there anything else I've missed?

Thanks for you help :)

If you ask me all you need is Brawl.

Boom Blox is definitely lesser known, but you already have it.

I suggest Conduit 2. Its a FPS with local multiplayer, as well as online.

Kirby Epic Yarn, DK Country Returns, Mario Strikers Charged are also some of my favorites that aren't on your list.

You've got most of the good stuff, but perhaps a COD game, a FIFA game, Donkey Kong, Rayman Origins, and a couple others?

Well you already have most of the good Multi-Player games.

I really have not much to offer. You might want to look at DKCR?

Big Brain Academy
MotoHeroz
WarioWare Smooth Moves

From my WW I enjoy playing Airport Mania or Art of Balance in coop, same as retails like KirbyEY or TraumaCenterNB.

Lots of excellent suggestions here already.

There are numerous titles with co-op play like all the Lego titles, Ghostbusters, and many more.
Sports titles of all sorts: NBA Jam, Tiger Woods ('10 or later), Madden, FIFA (I perfer 09 'cause it still has with Miis for non-serious players), PES (different play style than HD consoles, using IR to direct whole team). MLB or Power Pros
Mario Sports: Strikers (excellent), Tennis, Sports Mix, Baseball

My of the favorites of my guests is Dokapon Kingdom a RPG/Party game mix.

Let's Tap is a novel multiplayer game where you don't even touch the controller. Racing is particularly fun.

One of the Rayman Rabbids titles would be a good addition. Probably the third (TV Party) or there's a collection of the first three.

House of the Dead: Overkill - Good for drinking buddys (not kids)

Punch-Out has a multiplayer mode and is a fun Wii game for single players too.

Consider one of the Hasbro Game Nights.  I think the 2nd is best but havn't played them much. Again a collection is available.

Second: Brain Academy, Kirby EY, Kirby RtDL (4 player), DKCR, Conduit 2 (split-screen), DBZBT3, MH3, Excitbots, Rayman Origins (4 player)

Wiiware: There's a ton. Dart Rage, Pong Toss, Tetris Party, TV Show King are good for general audiences. There's a lot of crap though so you have to be careful. Folks at wiiwarewave.com might have better suggestions.

Bomberman..always one of the best multiplayer games.

Thanks a lot. I've seen already some interesting suggestions, I'm going to check some gameplay videos on youtube then I'll deicide.

Budokai Tenkaichi 2, Mario Party 8 (the last decent one for me), Umbrella series, Sin & Punishment: Successor of the Skies, Kirby games, Monster Hunter Tri-, DKCR and Go Vacation.
I own this games and i think they were really good in multiplayer.

The ones that can last really long are Budokai Tenkaichi 2, Monster Hunter Tri- and Go Vacation.