Google the name of the game followed by 'Walkthrough'.
E.g. I want a walkthrough for Pokemon Diamond, ill type in google 'Pokemon Diamon Walkthrough'. You will find plenty of results, usually the first ones are the best (not the sponsored links, the first of the results).
Stay away from sites that ask you to install things to use their cheats.
ThE AvEnGeR
Yes, you can find walkthroughs for Phineas and Ferb ride again and Phineas and across the second dimension DS games on YouTube.
If you go on Youtube, there are plenty of Walkthroughs for MySims Kingdom DS, and other games.
Online-DS Games, Won't Happen __________________________-- you must port the game
Walkthroughs for Lego Harry Potter can be found on Youtube.
They offer trial games, online gaming, and downloadable games. Also, they offer strategy guides and walkthroughs for the more difficult games or strategy games.
Gamespot is a popular website which contains walkthroughs for many popular video games. There are walkthroughs available there for "GTA - San Adreas".
No sorry, Although there are really handy walkthroughs to help you.
Online walkthrough for video games are legal. They do not violate video game terms in anyway. Places like GameStop and Wal-Mart sell these guides, too.
download it online but i dont recommend it its illegal
half.ebay.com
Only some
There are numerous DS games that let you go online. Some are more restricted, but others are more free, letting you do almost anything you want. Games that have online features include Animal Crossing, Pokemon, Legend Of Zelda: Phantom Hourglass and the DS browser is good for searching online. For a complete list of online DS games, try searching up google.