Out of all the secret Eggs in Deltarune, Chapter 2 has the quickest and easiest route to get to it. It'll still require progressing with the story and getting somewhat lucky, but you can pick this up ...

Out of all the secret Eggs to pick up in Deltarune, Chapter 3 has the most complicated one of the bunch. It's just as important to grab as the other Eggs - i.e. completely meaningless, at the time of ...