I don't think the Deltarune fandom is mentally prepared for the moment we get a Light World battle against Susie maybe right before the Roaring begins.
The Undertale battle UI appears, and the music kicks in with a reprise of VS Susie mixed with Battle Against a True Hero or Hammer of Justice or probably both.
I could totally see the track being called Battle Against a Real Hero or even Battle Against THE Hero.
I also imagine a second Susie fight borrowing mechanics and attacks from Gerson and Undyne the Undying.
It would be very very interesting to see what an Undertale style battle from modern Toby Fox would look like.
Vs. Susie (Reprise) by JulianIzEpic on youtube
(probably my favorite Vs Susie cover I've heard)
Susie sprite by @Delphine_Ariel
So you can apparently dodge Blue's flowers and get slightly different dialogue with the same result which implies to me that Yellow specifically set up this flower room to try and have a reason to "get you".
Between this and the laser gun "missing" him, he's secretly cunning.