So it...was a magic door, sort of?

[That's at least something Frisk can wrap their head around.]

Um, well it's been really fun for me! I made bunches of friends, an' some of 'em even wanted t' stay an' travel with me! Um, here, lemme show you--

[The camera goes a bit crazy for a moment, and there's the sound of a few things knocking around before a very amused little Turtwig comes into view.]

This is Hammer! He came outta an egg!