As a result of the discussions in this thread, I made a userscript that displays the pitch type for a given vocabulary reading. The data has been automatically generated from results on http://www.weblio.jp and will auto-lookup any new ones WaniKani may add in the future.
A userscript app for you given browser, tested working with:
Tampermonkey (Most Browsers, Preferred)
-Check if pitch info is different for secondary readings and display it
-Handle checking for contextual pitch info
-Look into Greasemonkey compatibility issues
Implement some more colorful/visual modifications of the readings themselves instead of just a description. Done! Big thanks to nasatitan for programming this visual representation of pitch.
-(Maybe) Give occasional knowledge about general pitch rules.
-(Maybe) Option to require writing the correct tone number in your answer.