This week on eShop: 'Mighty Switch Force'

Mighty Switch Force headlines this week's Nintendo update.

Take on the role of space police officer Patricia Wagon in the 3DS debut from developer WayForward, best known for the critically acclaimed Shantae: Risky's Revenge. Download it for £5.40.

In another highlight, Nintendo is launching the Nintendo Letter Box application, which allows users to send messages to friends or exchange notes, doodles and photos through StreetPass.

Also available this week are Football Up and a demo for MotoHeroz on WiiWare, Tetris on the 3DS virtual console and Castle Conqueror Heroes and Commando: Steel Disaster on DSiWare.

> Read last week's Nintendo download update

This week's Nintendo download update in full:

3DS eShop

• Mighty Switch Force (£5.40)
  
• Nintendo Letter Box (Free)
  
• Tetris (£3.60)

DSiWare

• Castle Conqueror Heroes (500 Nintendo Points / £4.50)
  
• Commando: Steel Disaster (800 Nintendo Points / £7.20)

WiiWare

• Football Up (500 Nintendo Points / £4.50)
  
• MotoHeroz Demo (Free)