You guys requested it, and Lord Blaze has given it! Below is a sound board for FiM. Sadly for you iphone/windows people it is specifically for android, but hopefully something will pop up for you guys eventually!
It currently has the mane 6 with 13 lines for each. The creator plans to add a bunch of new ones to the mix, but decided to release it now since everyone wanted it so badly from the soundboard post.
You can find the link below! I downloaded it directly on to my android phone, but the readme for the more complex way of doing it is in the zip file.