Didn't realize how many I'd forgotten from Hoenn, Sinnoh, and Unova. And I've yet to learn their names in Kalos.
As a request, can you split up the Striaton Gym into 3 and also make Japanese names a possible answer? I watch the anime subbed so I tend to recall more recent gym leaders by Japanese names. I had at least 3 that I knew the JP name for but not the US name. >.>