You can if you have a PC nearby with internet connection, I actually used my DS to play Megaman X on my Android Tablet.
For the DS you need DS2KEY (Its homebrew, you need a flashcard to run it)
For the PC you need DS2KEY (you need an internet connection)
For your Android you need an app called
Wi-Fi Keyboard
Here's how it is, DS2KEY sets up whatever button you wanna use, my configuration is:
DS2KEY:
Press A button = Computer receives the keyboard key A (using Wi-Fi keyboard) Android receives the keyboard key Z
Press B button = Computer receives the keyboard key (using Wi-Fi keyboard) Android receives the keyboard key X
Press the Start button = Computer receives the keyboard key Enter (using Wi-Fi keyboard) Android receives the keyboard key Enter
Press the Select button = Computer receives the keyboard key Backspace (using Wi-Fi keyboard) Android receives the keyboard key Backspace
Press the L button = Computer receives the keyboard key L (using Wi-Fi keyboard) Android receives the keyboard key L
Press the R button = Computer receives the keyboard key R (using Wi-Fi keyboard) Android receives the keyboard key R
Press the D-PAD UP = Computer receives the keyboard key UP Arrow (using Wi-Fi keyboard) Android receives the keyboard key W
Press the D-PAD DOWN = Computer receives the keyboard key DOWN Arrow (using Wi-Fi keyboard) Android receives the keyboard key S
Press the D-PAD LEFT = Computer receives the keyboard key LEFT Arrow (using Wi-Fi keyboard) Android receives the keyboard key A
Press the D-PAD RIGHT = Computer receives the keyboard key RIGHT Arrow (using Wi-Fi keyboard) Android receives the keyboard key D
So basically, DS2KEY transfers the input to PC and your PC transfers it to your android with the help of a Wifi keyboard app.
You can configure the key binds as you want, that was just my configuration.