Here are some web sites that sell Nintendo DS games and Nintendo Gamecube games and deliver them to Ireland.

GAME - sell nothing but video games and consoles. They have a good selection of Nintendo DS games and will deliver to Ireland for £2.95 GBP per order (Max weight 1Kg) .
Play.com also sell Nintendo games along with all the other console games and nothng is charged for delivery to Ireland.
Sendit also do not charge extra for delivering DS or gamecube games to Ireland. DVDs and Music are also sold here.
Blah is another online shop with free delivery to Ireland on all orders. They stock Nintendo DS and Gamecube games. They also sell DVDs and CDs.
CD WOW sell a selection of DS games too and delivery to Ireland is included in the prices you see.
HMV Sell some DS and Nintendo Gamecube games. They deliver to Ireland too - the cost depends on the number of items ordered. A typical order of 2 games would cost £3.50 GBP to deliver anywere in Ireland HMV also sell cds and DVds	HMV

DVD Players
Digital Cameras
LCD TV
HD TVs
Portable DVD
Camcorders
MP3 Players
Digital Radios
SatNav
Computers
Printer Ink
Copiers
GPS
Batteries

Beauty

Perfume
After Shave
Skin Care