Must be in overview mode to play first ones

http://javascript.internet.com/games/dots.html

the classic dots game, in HTML tho.

http://www.masswerk.at/JavaPac/JS-PacMan2mini.html

2 ways to play this pacman, u can use the joy stick in the bottom right corner, or you can hold R or L and use D-pad on DSi

http://javascript.internet.com/games/Tetris.html

This one is Tetris, hold L or R and use D pad to control. Left and right moves it left and right, up turns it to a different position, down makes it speed up going down.
Now, this ones a bit weird, so dont look at the zoomed in screen, but look at the zoomed out screen, and ignore the zoomed in screen cuz while u play it will be going everywhere, but if u ignore it then u can play it lol

http://javascript.internet.com/games/rocket-blaster-demo.html

K this one u shoot at rocket things, it works on DSi but barely, and its hard, but fun once u get the hang of it.
It actually moves pretty fast, considering on DSi. Just u can use the screen to zoom in and aim just below the rockets and tap the screen, the rocket will shoot a little bit above where u tap. Aim carefully and precisely and you will be an epic shooter in no time!

http://files.myopera.com/rkm/ds/offlinedsgames.html

Once you get on this 1, make sure ur in COLUMN VIEW and go and click download, then click 20.3! WARNING, IF YOUR GOING TO BOOKMARK THESE GAMES BOOKMARK ON THE LINK I GAVE YOU!
Use R or L and D-pad to play some of these games. xP have fun