Phineas & Candace soundboard is a free soundboard application.
You can choose from Phineas, Candace and Isabella sounds and conversations.
Also many more other characters from the series will be coming in future updates.
Here is a small little look into the application if you want to see more you will have to download it!
Phineas & Candace Soundboard is free and can be downloaded from Marketplace here.
If you have a QR code reader or Mango you can just scan this QR on your windows phone device.