Wario Ware Inc. Is the most reasent one I can name.

Hmm...I say Tak and the Power of Juju is pretty weird. And also this GBA game...the Yuyu Hakasho: Spirit Detective...

i cant remember the exact name but pcycic force or something like that u were a bunch of psycics and the 2 main charecters the bad guy and the good guy had to unique powers the good guy could makefireballs and summon a giant pheonix and the bad guy had ice and could make a dragon if i remember right

^^ Claymates? (see thisone.jpg)

As for me, I'd have to go with boogerman. (see boogerman.jpg)

I think the weirdest game I ever played was Wario Ware Inc.
The weirdest thing was that How there could be people that will pay 40 bucks in order to press A BUTTON !!!!!!!!????
Is the only damm thing you do on that game....it doesn't even have a storyline, its just Wario and some Retro dudes making you play silly versions of games.
Come on, The Legend of Zelda is reduced to just ENTERING A DAMMED CAVE IN 3 SECONDS....also, there are some WEIRD games on that game, like one in which you have to poke your nose....yuck....that game sucks, luckily I played a friend's one...

Hmm, Clay Fighter 63 1/3 was pretty weird.

I have to go old school for this topic and say earthworm jim.

what is weirder then a super powered earthworm that launches cows and shoots puppies?

There are few things more bizarre than making fish crap gold coins while being attacked by aliens. Though Conker's Bad Fur Day for the N64 comes to mind. I'm so happy they're making a sequel for it :D

There was this game, I cannot remember it's name, but you were some sort of strange robot crusader following Santa Claus as you battle the evil doctor Einstein and his robot horde. Each time you would defeat one of his most powerful robots you would steal from them their prized and most noble possession.

I remember back in the day of the Sega Genesis, I played a side-scroller called "*insert name here* the Kamikaze Squirrel." It was about this Kamikaze squirrel that used kunai and nunchuku...and stuff. Not as strange as the awesome Earthworm Jim (and it's sequel), but weird nontheless.