Looks like they're holding a four week sale on various 3DS and Wii U titles based on Super Smash Bros characters.
Week 1 9/4 - 9/11:
Super Mario Bros 3 (3DS/Wii U) - $3.49
Super Mario Bros 2 (3DS/Wii U) - $3.49
New Super Mario Bros U (Wii U) - $39.99
Super Mario 3D Land (3DS) - $19.99
Super Mario 3D World (Wii U) $39.99
Yoshi's New Island (3DS) - $29.99
Punch Out!! Featuring Mr. Dream (3DS/Wii U) - $3.49
Week 2 9/11 - 9/18:
Games based on The Legend of Zelda, Fire Emblem, Kid Icarus, F-Zero, Mega Man, and Sonic The Hedgehog
The Legend of Zelda™: A Link Between Worlds (3DS) - $29.99
The Legend of Zelda™: Oracle of Ages (3DS) - $3.99
The Legend of Zelda™: Oracle of Seasons (3DS) - $3.99
The Legend of Zelda™: The Minish Cap (Wii U) - $4.99
The Legend of Zelda™: A Link To The Past (Wii U) - $4.99
F-Zero (Wii U) - $4.99
Fire Emblem: Awakening (3DS) - $29.99
Sonic the Hedgehog (3DS) - $3.49
Mega Man (3DS) - $3.49
Mega Man 2 (3DS) - $3.49
Mega Man X (Wii U) - $4.99
Mega Man X 2 (Wii U) - $4.99
Kid Icarus (Wii U) - $3.49
Kid Icarus: Uprising (3DS) - $24.99
Week 3 9/18 - 9/25:
Games based on Pokemon, Metroid, Wii Fit, and Miis
Pokémon™ Battle Trozei (3DS)
Pokémon Rumble U (Wii U)
Metroid™ (3DS/Wii U)
Wii Fit™ U (Wii U)
Week 4 9/25 - 10/2:
Games based on Donkey Kong, Kirby, Pikmin, Star Fox, Pac-Man and Animal Crossing
Animal Crossing™: New Leaf (3DS)
Pikmin™ 3 (Wii U)
Donkey Kong Country™: Tropical Freeze (Wii U)
PAC-MAN™ and the Ghostly Adventures (3DS/Wii U)
Edit: Added rumored future week sales thanks to Zeeman
We had a similar Smash Bros Character sale last month. The only Mario games in it were NSMB2 and NSMBU. The discounts were like 20% off too.
US only? Just bought 3D World, it's still €60 here though, luckily I got it for €47 but still :X
And to think the Americans were crying about that...I guess Punch-Out was 50% off though...yeah that totally makes up for it.
Edit: Europe didn't get any Metroid, Pikmin, Star Fox or F-Zero discounts
Wii Party/Wii Sports (?)
You don't have to finish every level with all five characters for stamps, unless there's stamps I don't know about.
Wasn't NSMBU already down to $40 for regular price?
That 3D World price though...
How long would it take to 100% that game? I know you have to finish every level with all 5 characters for 5 stamps (though there is that multiplayer trick).
Still though, I would easily pay for almost all of these if they were cross-buy. Nintendo has lost out on so much money from me without cross buy support.
I'm literally stuck deciding on which version to buy which leads me to not want to buy either of them.
This is going to be trouble for my wallet.
Digital is slowly becoming cheaper than retail...
I'll probably grab at least 3DLand though. Maybe Mario 3.