➟ every story
For echo; I have a set route that the chapters will follow. However, I guess you do have the option to travel backwards to past areas if you wish, and thus skipping one gym to beat it at a later occasion. But then I'd probably require at least one post for every area you passed through on your way back to a previous gym :p
Losing to a gym does indeed seem like something that could be very character building.
In the 5th gen. games, when you use TMs, they don't go away and can be reused over and over on other Pokemon, so you couldn't theoretically teach the same TM to several Pokemon who can learn it without having to rely on breeding as a backdoor method to get those movesets. Very similar to HMs but you don't have to visit the move deleter to remove HM skills as opposed to TMs.
I personally prefer the 5th gen. method but I can understand the reasons for adopting the older method instead.
I sort of had the same train of thought. However, I do think we ought to have different gym leaders from the games, at least to some extent, unless this RP takes place in an alternate timeline from the games and anime (otherwise it would make no sense to battle Brock).
Still, gym leaders shouldn't adjust their teams too much if they do. Gym battles are meant to test the capabilities of the trainer so I will dissent on the adjusted teams philosophy. Our battling is more akin to the anime as well, so lower level, unevolved Pokemon can have a better shot at taking on a tougher opponent with the right strategy.
Also, you can use TMs immediately or save for later use. But they will disappear after one use. More challenging like that :3
This RP is set in an alternate timeline, yes. The gyms will have the same types and probably the same leaders as the old games though. Plot reasons :3 As for Koga, you'll just have to wait and see!