League of Legends Class Combinations | PlotAPI.com
In this project we're going to use PlotPanel to visualise the co-occurrences between League of Legends classes. We're going to use League of Legends Champion data from version 12.4.1, a copy of which is available through the Riot Games API.
The link throws me to the "pay for this api" page, most likely not what you intended OP!
Indeed, should be free!
The raw data would be interesting to mess with, do you have it?
"League of Legends Champion data from version 12.4.1, a copy of which is available through the Riot Games API.", no more details I'm afraid