Comments

undeltale developer mode
teams:G — opens the chest
G (in the store) — gives 5000 M.
S — opens the save (includes a window for saving)
L — loads the save
M — Increases by 1 level
F — does 60 FPS
P — makes the speed of the room faster
R — if pressed 7 times will restart the game
U — changes the appearance of Frisk
V — shows the boundaries of the room
W — slows down by 10 FPS
5 — increases the group of monsters by 5
Backspace — increases the player's speed (if held)
Pg Up — increases steps by 100
Pg Down — Makes a 989 Attack
End — includes the story of Azriel and Enchantment (Tsvetyk's story on the Path of Genocide)
Home — Starts a battle in a group of battles. By default 140 (So sorry) in version 1.0 or 80 (Mettaton) in version 1.001. Change 0x9F553C (in version 1.0) or 0x9EB414 (in version 1.001)
Insert — teleportation to the next room
Delete — teleportation to the previous room
F3 — will create a system_information_962 file in the game files (Chara
F7 — adds 500 M. (give Tammy money for college)
F9 — stops all music being played
F10 — Allows you to pass through walls (not objects!) if
pinch, will allow you to walk during dialogues
F11 — teleportation to room_water1 (Waterfall)
F12 — Destroys the barrier
R + 6 — teleportation to Ruins
T + 6 — teleportation to the exit from the ruins
F + 6 — teleportation to Zharkozemye
E + 6 — teleportation to a New Home
Y + 6 — teleportation to a Real Laboratory
In Battle:
1 — Reduces the speed (if very slow, the game will turn off)
2 — Increases speed by 2x
8 — Reduces the opponent's turn
9 — Increases the opponent's turn
Delete — Makes 999 OZ (Very helpful in the battle with Sans)
F6 — Instant kill (on the next attack) or instant
mercy
O + P — Includes mercy (you need to press two buttons immediately)