>>35757023Falkner, Bugsy, Whitney, Morty and Jasmine all had their names. Whitney didn't have a sprite yet, the rest have prototype sprites that generally seem in line with their final design/concepts.
Red was intended to return as the Gym Leader of Kanto, more or less taking the role that Blue would have in the final product.
The other two Gym Leaders, Okera and Gama, just have their names and placeholder sprites. Maybe something about their role can be inferred from the gyms/towns they're assigned to, but there's no other hard data related to them.