>>57977123 (OP)No.
There's nothing to develop there, he's established as already and competent trainer. Unless you really want a fucking Solo Leveling sloppa, but I would rather prefer to have boiling iron poured into my eye sockets than watching that.
You could make like a prequel showing us Alain as a newbie and how he got where he is, but what's the point? Especially that Pokemon franchise is supposed to always sell new shit so going back in time would be very counterproductive to it.