UNDERTALE: CORE Walkthrough: Neutral Route

Things to Do in the Core in the N Route

Prepare Recovery Items Before Proceeding

Before advancing through the CORE, make sure to replenish your recovery items at the shop near the MTT Resort or inside the hotel itself.

If you find it difficult to purchase items due to insufficient G at the shops around the CORE, you can go back to Waterfall or Snowdin to buy recovery items.

You Can Choose to Defeat or Spare the Monsters

If you have defeated at least one monster by the time you reach Hotland and have not locked yourself into the Genocide Route at Ruins, you can proceed with the N Route.

Alternatively, if you have not defeated any monsters until Hotland and choose to spare all monsters in the CORE, you can also progress through the N Route. The choice of whether to spare or kill the monsters is up to you.

Mettaton EX Battle Walkthrough Chart

Purchase Equipment and Items at the Shop

Before proceeding to the CORE, it is recommended to purchase recovery items at the shop next to the MTT Resort or inside the hotel.

If you don't have enough G to purchase items at the shops near the CORE, you can go back to Waterfall or Snowdin to buy recovery items.

List of Recovery Items and Prices Around the CORE Entrance

Proceed to the Left and Battle Madjick

After leaving the hotel and entering the CORE, you cannot initially enter the elevator in the center. Follow Alphys' instructions and proceed to the left to engage in a battle with Madjick. Defeat it by attacking or performing specific actions to escape and end the battle.

Proceed to the Right While Being Cautious of Lasers

When you press the switch, the dead end is removed, and the lasers come towards you in the order of "Blue → Blue → Orange".

Move like you did in Hotland; proceed when the orange laser is moving, and stop while the blue laser is active. This will allow you to pass through without taking any damage.

Proceed Upwards and Battle Knight Knight

After passing through the lasers, follow Alphys' instructions and proceed upwards to engage in a battle with Knight Knight. Defeat it by attacking or performing the action "Sing" three times to let it escape and end the battle.

Moving Slowly While the Laser is Stopped

After battling Knight Knight, move to the right to trigger a conversation event with Alphys. The blue laser will start flashing. Move slowly to the right while the blue laser is stopped.

Move to the Left From the Save Point and Solve the Puzzle

From the save point "CORE - Crossroads," move to the left and solve the puzzle. In the CORE puzzle, you can use two shots. Move the panels in the middle row to form a straight line to clear it.

You Can Proceed Even If You Press the Switch in the Back Right of the CORE

You can proceed even if you press the switch in the back right of the CORE. There will be a large number of monsters on the way to the switch. If you're not good at puzzles, it is recommended to press the switch and move forward.

Return to the Save Point and Move to the Right

Return to the save point "CORE - Crossroads" and proceed in the order of "right → up → right." It is easy to get lost due to many similar paths.It's a good idea to return to the save point if you're unsure.

Check Trash Cans to Obtain Items

Check the two trash cans in the back of the save point to obtain items. In the trash can in the back left, you can get a recovery item called "Glamburger." In the trash can in the back right, you can obtain 100G.

Fighting Mettaton EX

After crossing the bridge and advancing to the depths of the core, you will engage in a battle with Mettaton EX. You can either defeat Mettaton EX by attacking or choose the "Action" command to avoid attacks and raise the "Ratings" in the top left corner of the screen to 12,000. When Mettaton's soul appears, attack with the yellow soul to increase the ratings.

If It's Your First Time, There Will Be a Battle with Mettaton (3rd time)

If you are playing for the first time, you will engage in the third battle with Mettaton. Avoid attacks until Alphys gives instructions, then choose "Flip" in the Action menu to end the third battle. You will then proceed to the battle with Mettaton EX. After engaging in the battle at least once, the third battle with Mettaton can be skipped.

You Can Return to the Entrance of the CORE Using the Elevator

Once you reach the save point "CORE - Entrance," the elevator will be activated and you will be able to return to the entrance of the CORE. If you are running low on recovery items, go back and restock.

Guide on How to Defeat and Spare Mettaton EX

Items Obtainable in the CORE

List of Items

Monsters Encountered in the Core

Encounter

Monster	Details/How to Spare it
Madjick	[Details] ATK: 29 DEF: 23 [How to Spare] ・ Use “Stare” at the “Chaser Orb” then at the “Corner Orb” ・Use “Clear Mind” then “Talk” ・Use a Stick
Knight Knight	[Details] ATK: 36 DEF: 36 [How to Spare] “Sing” to her 3 times
Whimsalot	[Details] ATK: 34 DEF: 12 [How to Spare] Select “Pray” once, touch a green butterfly, then select “Mercy”
Final Froggit	[Details] ATK: 30 DEF: 24 [How to Spare] Select the “Mystify” ACT then select “Mercy”
Astigmatism	[Details] ATK: 32 DEF: 27 [How to Spare] While battling Astigmatism, take note of what he is saying. If he says “Pick on me,” use “Pick on me.” If he says “Don't pick on me,” use “Don't pick on me”

Boss

Monster	Details/How to miss it
Mettaton EX	[Details] ATK: 47 DEF: 47 [How to Spare] Raise the viewership rating to 12,000 *After Turn 20, a viewership rating of 10,000 also spares Mettaton EX

Monster list

Neutral Route Strategy Chart
Ruins	Snowdin	Waterfall
Hotland	Core	New Home

Strategy Chart by Route
Neutral Route Strategy	Pacifist Route Strategy	Genocide Route Strategy

Strategy Chart List