[Gaming]/Nintendo Network Maintenance

Starting tomorrow, January 28th  at 12:00pm PST and lasting until 5pm PST on Tuesday (Jan 29th) a few bits of the Nintendo Network will be going undergoing some emergency maintenance. During that 29 hour period a few systems/games may or may not work at various times for the WiiU, Wii, DS, 3DS and DSi.

The only games that seem affected are Pokemon Black and White/Black and White 2 and Warriors Orochi 3 Hyper. Though, with the eShop going under the knife a bit as well, it's probably safe to say that some games from there may have a weird hitch or two as well.
 
Want the official word? Well, here's the announcement from Nintendo themselves after the break:

From Monday, January 28, 2013 11:00 PM
- Tuesday, January 29, 2013 5:00 PM Pacific Time

Affected Services:

• Nintendo DS
  
  • Network Services
    
    • Pokémon Black Version
      Pokémon White Version
      Pokémon Black Version 2
      Pokémon White Version 2

From Monday, January 28, 2013 5:00 PM
- Monday, January 28, 2013 6:00 PM Pacific Time

Affected Services:

• Wii U
  
  • Match Making, Ranking, etc.
    
    • Warriors Orochi 3 Hyper

From Monday, January 28, 2013 12:00 PM
- Monday, January 28, 2013 5:00 PM Pacific Time

Affected Services:

• Wii U
  
  • Nintendo eShop
• Nintendo 3DS
  
  • Nintendo eShop
• Wii
  
  • Wii Shopping Channel
• Nintendo DS
  
  • Nintendo DSi Shop

*During the emergency maintenance, parts of the affected services
may be intermittently unavailable.

 via Nintendo.com