{I have been writing Archer since 2013, back in the days of him having only a handful of written lines of dialogue in HG/SS. If you wanted to look a little harder at FR/LG and Stadium 2, you could technically add another handful of lines to that count but you were still left with barely anything to draw inspiration from. You could also go a little further and look at the AI for his NPC in the HG/SS games (wherein he is coded to be as tough a fight as a same-level gym leader, giving him a higher difficulty count than all previous Rocket encounters with Ariana coming in as a close second with gym-trainer-level AI) to get an idea of what the developers wanted you to think about his character and how they wanted you to come away from his encounter but, again, there still wasn't much in the way of official inspiration (which, to be clear, there's no complaint there; it meant there was a door left wide open for anyone to interpret him as they would like to and heaven knows I've taken every ounce of advantage of that as I could over the years).
{Then he comes back in Let's Go, Pikachu!/Eevee! and we get all this additional dialogue and can I just say how much I absolutely adore every single line of his in those games? It's so easy for Game Freak to take a character, especially a very little-known and often forgotten character like Archer, and just absolutely ruin them by just completely forgetting/disregarding what they had established for them originally and going in a completely different direction or by shafting them entirely in some other form or fashion (by, say, giving them a poorly accented voiceline in PokeMas, for instance, which I'm grateful to say is not the case for Archer) and yet it feels genuine to Archer's character and what little is established to be his personality/manner of speaking when he makes his appearance in LGPE.
{I was, briefly, absolutely devastated by the quote in LGPE where he writes the player-character a letter, waxing poetic about how happy he was for them and how much he didn't hold a grudge and all this sappy nonsense that was not in keeping with his character at all. Having read the quote online (but not having experienced it in game yet), I was convinced Game Freak had ruined my favorite character and I was resolute to not even go through with facing him a third time in game. Then, bored and frustrated and giving in because it was a chance to see him on screen one last time, I decided to give it a go and just... he's grinning the entire time he reads that letter. You don't see anything of him on screen besides that wicked, snarky grin and by the gods it. was. perfect. I had never been more happy to be wrong in my life. It's not often a game franchise writes a character and keeps them true to themselves as much as they did with Archer in this case but good gods I am delighted they did.}
