Quack Prep does not work on console versions of Undertale (Switch, PS4, Xbox) due to differences in the RNG implementation. It is exclusive to the PC version.
Let me break down what this likely refers to: quack prep undertale
Because Undertale boss fights (especially Genocide route) are . Quack prep gives us: Quack Prep does not work on console versions
The first question appeared on the screen: $$ \frac2x+5x-3 = 7 $$. Quackquack's eyes widened as they stared at the equation. This was going to be tougher than they thought. quack prep undertale