When I went looking at the source it seemed like it was just straight unimplemented. I never bothered fixing it, and just used other tricks to get around it; at first defining movepools in XSE, and later using .csvs and a Python script to insert them.
Oooh, I should of known that! xp
I used to play some League of Legends but not much, I didn't even get past level 30. I would mainly play adc with Jinx or Corki, and I think Ezreal was an adc too. haha
That's a really cool idea to mix LoL in with Pokemon though, I wish you the best of luck! How far are you into it?