(Part with angry Flowey, forgot words. Basically Flowey gets mad and decides to attack Frisk at the flowerbed, trying to take their SOUL and regain control of the timeline. Flowey almost succeeds as he absorbs their SOUL, but Frisk and Flowey RESET at the same time.)

After RESET

Chara wakes up, still a ghost, but new clothes and hair (Undertale 5th anniversary DeadMix style sprite as the design)

Chara: "Well, that was unexpected."

They take a moment to look around (This area is the equivalent to the part of the map between Swampside and the starting area, Kokoro's grave)

Inner thoughts "I don't recognize this part of the Underground. Also, these clothes definitely aren't mine."

They look at their reflection in the water

"...But they are a nice change of pace. Even the bun isn't half bad. I'm still not sure what's going on here, but I assume I'll have to find Frisk."

Cue looking for and finding Frisk, similar to DeadMix with Frisk lying in water and flowers. Frisk wakes up as Chara approaches

Chara: "Hey, are you ok?"

Frisk nods as they get up, brush themselves off, and shake water away

Chara: "Any idea what happened?"

Frisk thinks for a moment, then shakes their head no. They begin to explain the last thing they remembered

One explanation later…

Chara: "I see… So you think it has something to do with that flower?"

???: "There you are!"

A very angry Flowey pops out of the ground

Flowey: "What did you do?!"

Chara looks over Flowey, he's also sporting his design from the 5th Anniversary sprites

Chara: "Did he always look like that?"