User blog comment:SuperBearNeo X/Undertale Statistics & Explanation/@comment-33067344-20180329113835

Asriel was considered infinite by Frisk; who's a 3rd dimensional being, of course someone who's 4D (Asriel) will be infinitely above someone who is 3D (Frisk)

Chara's explanation honestly doesn't work here; IIRC, these nines are the damage measurement, they don't represent timelines on the slightlest.

Flowey created save files one by one; Low 2-C hax at best.

Furthermore, someone calculated the amount of timelines, gonna paste it here

"(casually destroyed the game. The game contained a multitude of timelines, from Flowey resetting the game until he knew every outcome, to Sans canonically killing Chara 13 times; then counting his three other bonus statements, 16 timelines had to of been created during that boss fight. As for Flowey, he states he knew everything, but could never predict Chara. He read every book and burned every book? 2 timelines, one for reading, one for burning, and Pacifist and Genocide routes. 2 x 2 = 4. He then states he won every game, and lost every game. All games in Undertale include Bridge Seed [contributes 7 timelines, one for each bridge successfully built and failed on and one for Genocide], Hotland Puzzles [contributes 36 timelines, one for each report on the quiz, pass and fail, and passing and failing each puzzle], Ruin Puzzles [contributes 14 timelines, one for success and one for fail on each route], Snowdin Puzzles [contributes 24 timelines, one for pass and fail, and one for each ending of the Ball Game], Thundersnail [contributes 20 timelines, one for each placement of each snail, and one for when the yellow snail almost wins and for each route] and Waterfall Puzzles [contributes 16 timelines, one for pass and fail and for each route]. Adding all previous timelines, including Sans, we get 137 timelines thus far. Continuing, Flowey states he's appeased everyone and killed everyone. There are 94 monsters in the game, and with Pacifist and Genocide, 94 x 2 = 188. 188 + 137 = 325 timelines. Next, Flowey says "Sets of numbers, lines of dialogue... I've seen them all." Assuming sets of numbers means sets of damage, there are 9 weapons in the game. 9 x 2 = 18. 94 characters x the 3 routes of different dialogue = 282. Adding all previous timelines, we end up with 625 timelines."