Egg dialogue: for get that after get in toriel house go back to long corridor in ruins and there will be a monster that gives the egg after that you can do the rest normally
If you knock over the bowl of Monster Candy, then get the Egg from the Migospel NPC and then put it on the podium where the Monster Candy was to get the Chocolate bar, he says this after his comment on Flowey and before his comment on the abandoned vessel: * YOU ALSO FOUND IT. * AND YOU TRADED IT FOR A CANDY. * OH, HOW YOUR CURIOSITY REWARDS YOU. * JUST AS MINE REWARDS ME. * ... * AT LEAST, MOST OF THE TIME.
imagine if on the main kris route if you kill every monster but spare only humans (Obliteration run in Section 1, Obliteration run in Section 2 as well but you abort the route by sparing the first human you find, and proceed to FIGHT every non-human creature but spare the humans), Gaster ends up commenting on this racism act at the final section. "Hey dawg you literally killed/hurt everything except humans lol"
If Gaster Detects Recording Software Like OBS Open He Will Say Perhaps You Were Perplexed By The Queen's Hostility. (Start Dialogue) … Only You Know The Answer To This. I Do Hope This Is Not Just An Answer To You. An Answer You Could Make Available To The World. That Would Breach Our Privacy, Of Course. YOU WOULD NOT BE DOING SUCH A THING, WOULD YOU? Nonetheless, (Continue Dialogue)
@Tails Gaming not blaming chara it seems actually gaster literally says chara is vengeful and that you murdered their best freind.Clearly showing chara isnt the one to blame and is EXTREMELY upset about the genocide that occurred.