Quack Prep Undertale Review

In Undertale fan circles, "quack prep" is a joking/misheard phrase from Mettaton's quiz show (the "Button" segment). The actual line is something like: "Correct! Prepare for..." but fans often mishear it as "Quack prep!" — especially since Mettaton's EX form has a duck-themed transformation (legs → duck feet).

| Step | Action | Purpose | |------|---------------------|-------------------------------------------| | 1 | Press Up (x2) | Advance RNG by 2 frames | | 2 | Press Left + Right | Create a "null move" that doesn't move you| | 3 | Open Menu (ESC) | Force a state change | | 4 | Navigate to ITEM | Seed manipulation | | 5 | Cancel out (ESC x2) | Reset input buffer | | 6 | Rapidly tap Z (x4) | The "quack" itself (mimics duck call) | quack prep undertale

Do this exactly three times. Then, walk into the boss arena. The first attack will often be a predictable pattern, giving you precious extra frames to react. In Undertale fan circles, "quack prep" is a

Note: 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. Note: Quack Prep does not work on console

Deep within the lore of Undertale, if one delves into the game's text dump, is the character Gaster. W.D. Gaster is the game’s most enigmatic figure—a skeleton scattered across time and space, accessible only through hidden "FUN" values and debug modes. His dialogue is usually garbled, his entries in the True Lab written in a strange font.

However, the infamous Vietnamese guidebook had a different interpretation. When describing Gaster—or perhaps misinterpreting a line of code or a sprite—the guidebook referred to him not as a brilliant scientist, but as "Quack Prep."

The name is absurd. It strips the spooky, glitched aura from Gaster and replaces it with the image of a duck in a chef’s hat. Perhaps he is a duck being prepared for dinner? Perhaps he is a chef who specializes in duck? The ambiguity only fueled the fire.