@TerrariaOn3DS, @Champion Greninjoid, @ThatOneKid5, I finished it! Chapter 2.5 is done! Is this sorta like what you wanted to see with the whole "flashbacks" thing?Chapter 2.5: An Unnerving Confrontation
"GAME OVER..." Frisk read. "That fight surprisingly didn't turn out too well for me..."
"Ooh, story time!" Chara said, plopping down next to where Frisk was sitting in the GAME OVER screen.
"Why aren't you trying to kill me again?" Frisk asked, surprised.
"I know when I'm beaten," Chara replied, "and besides, what kind of partner would I be if I tried to murder you all the time?"
"A demonic one," Frisk replied.
"Oh, hush," Chara said. "Just tell me the story already!"
"...Alright," Frisk responded slowly. "Here's what happened..."
Frisk finally got through Snowdin. She shared a few laughs with Sans, beat the puzzles made by Papyrus, and befriended all of the monsters in the freezing forest. And now, she was in Waterfall. She traveled for a while, befriending some of the monsters there, sharing some quality time with Monster Kid (and flirting with him, his reaction was HILARIOUS), and meeting Undyne. Finally, she was at the final encounter with Undyne (Before befriending the fish monster, of course). While she was fighting her, as per usual, suddenly...
Frisk looked around, finding themselves in the same area. But something felt different... She finally found it. There she was. The Heroine. Undyne the Undying. For some reason, Frisk grinned viciously. Why couldn't she control herself? She hit Undyne. Over, and over, and over. Undyne killed Frisk. Over, and over, and over. But eventually, Frisk killed her opponent. LV up!
Suddenly, she flashed back to her fight, where she was literally about to die! She tried to dodge the last spear that was flying at her, but it was too late. She died.
"...And that's what happened," Frisk finished.
"Snrk," Chara snickered, "Wha-*haha* what a LOSER! Defeated by a stupid FLASHBACK!" She started laughing. Hard.
Frisk sighed. "Shut up, Chara."
(END OF CHAPTER 2.5)
Oh, and if you ever want to go to a specific chapter, but you don't know what page the chapter is on, I have the "Table of Contents", sort of, on the first chapter!