[LES] (Undertale/Deltarune) "How would Toby Fox even introduce a character tied to complicated lore as Gaster", THERE IS NO COMPLEX GASTER LORE!
Whenever any discussions surrounding Deltarune come up, W.D. Gaster is likely to pop up. There's always discussions about him on r/Deltarune about how important he is, what he is planning, etc.
However, there's this weird idea that Gaster is too complicated to introduce in Deltarune due to all the "Gaster lore" that somebody would need to know in order to appreciate his appearance. And I'm just left confused because there is no actual "Gaster lore".
All that we know about Gaster in Undertale is that he was the Royal Scientist before Alphys, and created the Core. He "fell into his own creation" one day, either literally or metaphorically, leading to nobody acting as Royal Scientist for a time. Asgore remembers him, having waited to confirm a replacement. He speaks in WingDings font exclusively. He used the True Lab, experimented with dark fountains and knew two people he considered worth getting second opinions from.
That's all the information available on him in Undertale. In Deltarune he hasn't made any appearance, but so far he is heavily implied to be running the experiment that encompasses Deltarune and seemingly his voice has appeared so far in Chapter 1, 3 and 4.
Yes, that's all the hidden lore we know about Doctor Gaster. There is no hidden ARG you need to look through, there's no hidden files you need to meticuously analyze to know about him, there's no book that you have to read in order to understand how he's involved in Deltarune. He is just a scientist whose conducting an experiment which involves the player (you, the one reading this).
This isn't me saying that Gaster will make an appearance in Deltarune where he will say "It's me Wing Gaster, the royal scientist whose the uncle of Sans and Papyrus", but he isn't some complex character that only obssesed Toby Fox loreheads will understand. If he does actually make a substantial appearance in Deltarune he will be explained beforehand for all the casual players and explaining his whole deal will take like 10 minutes at most.
And I don't even think that he will physically appear in Deltarune, its just that saying that he's too complicated to be introduced naturally is silly considering how Asriel was introduced in Undertale