The undertale in Scratch
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undertale
The appeal of Undertale lies in its unique characters, music, and story that presents the player with important choices that impact the outcome of the game. Players can experience different endings based on their choices, encouraging them to play the game multiple times to discover new outcomes.
To express this appeal in Scratch, it is necessary to first create original characters and backgrounds that convey a unique world. Scratch allows for the creation of custom sprites, which can be used to create original characters and backgrounds. Additionally, programming the player with choices that impact the storyline can emulate Undertale’s emphasis on choice.
Undertale’s music is also a crucial aspect of its appeal. Scratch allows for the creation of simple music, which can be used to create original tracks to incorporate into the game.
Let’s explore how to express these qualities in Scratch together!
#01 Undertale - Gaster Fight WIP
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- 2015.11.8


Controls:
- Use arrow keys to move
Changelist:
- 0.1: Removed broken box, added fight feature, health bar (still buggy)
- 0.2: Nerfed WD Missile, added head animation when hit, added win condition
- 0.3: Cutscenes, laughs when you die, added Mode 2
- 0.4: Head moves at the end, added proper ending
- 0.5: Improved SOUL, fixed death, better sound effects
Credits:
- Toby Fox for Undertale
- DemonLordx64 for starting this
- The Great Anansi for music
- MajesticPie for inspiration
- Macho Man Randy Savage, my hero
#02 2-Player Showdown! Omega Flowey Battle Updated
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- 2016.7.5


The Battle of Diverse Attacks and Defenses
Flowey Controls: Z key fires white bullets, X key launches widespread shots, V key drops vines, and B key drops bombs. N key summons guns, while M key unleashes the flamethrower. A key fires biting objects, S key generates pellets, and D key summons flies. F key to save, G key to load. Number keys 1-6 activate various soul attacks. Frisk Controls: Arrow keys to move, 0 key to attack.
#03 Undertale Intense Sans Battle
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Controls
Blue Soul – Jump with ↑, Move with ←→
Red Soul – Move with Arrow Keys
Press Space to select (not often needed)
Sans evolves through five stages, each harder than the last. If you lose, you restart from the beginning. However, holding Space and clicking the green flag allows starting from stage 5.
Feel free to remix or add to a studio. Acknowledge the creator when borrowing.
Credits
Original game: Undertale by Toby Fox
Thanks to @haya_tofu, @nekonekonihonnsi, @Jillakatok, @platinum1492, and @yuuri623 for art and code
#04 Undertale - Fight with Fran
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How to Play:
Use arrow keys to move:
Up - up
Down - down
Right - right
Left - left
Avoid all attacks.
Note: If you find any bugs, report them. Updates are listed at the bottom of the credits.
Updates:
- April 30: Slowed heart movement, reduced HP.
- May 22: Slowed heart more, reduced HP again.
- May 30: Fixed wall glitch during warp and added new warp attacks.
#05 The Terrible Trio Updated
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- 2018.10.7


"Undertale"-Style Game
This game is a project based on "Undertale." The controls are the same as "Undertale," and various characters make appearances. The project has some lag issues - attacks might not work properly and music might be out of sync at times. It was created by a beginner developer, so please enjoy it for what it is. Feel free to remix this project, but don't forget to credit the original creator.
#06 Megalovania (The Grandiose Delusion) Updated
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- 2015.11.8


A Simple and Fun Action Game
In this game, control your player with arrow keys - in red mode you can move in all directions, while in blue mode it works like a platformer. Hold the Z key to slow down. Press M to mute the sound. If you experience lag, try playing on the Phosphorus website for better performance. The latest version features looping music and new attack patterns. Challenge yourself and aim for a high score!
#07 Multiplayer Battle Updated
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#08 hard! Undertale Sans Fight [demo] [Undertale fan game] Updated
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![hard! Undertale Sans Fight [demo] [Undertale fan game]](https://scratch.coach/wp-content/uploads/2025/02/409338152-1-274x206.jpg)
How to play
Action | Key |
---|---|
Movement | arrow key |
Jump (for blue souls) | Up arrow key |
Decision and text feed | Z key |

The most remarkable aspect of this Scratch project is how it implements the blue soul mode! When users control with arrow keys, they can jump with realistic gravity effects.
Looking at the code, it uses a "jump power" variable to control the upward and downward velocity. It starts with a negative value (upward direction) and gradually increases, creating a parabolic arc just like in the real world.
What's even cooler is that it changes the soul's color and orientation based on Sans's attack patterns. For instance, when it receives a "down slam" command, the soul flips downward and gravity reverses direction. This brilliantly recreates the intense atmosphere of the original battle!
If you also have any recommendations, let me know in the comments on my Scratch profile!
#09 Undertale- Ultimate Temmie fight
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- 2018.2.20


Use the arrow keys to move. This fight is inspired by Undertale battles, but in this one, Temmie doesn't let you fight back. Just survive as long as you can. You're filled with determination!
Update: New Easter egg, bug fixes, more animations, new ending, Temmie turns evil, better graphics, and different endings.

#11 Pokemon X Undertale
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This project took 3 days to make.
Use arrow keys to move through buttons and "Z" to select.
In "Heart Mode," dodge objects to avoid damage.
In "Attack Mode," press "Z" in the green box to deal more damage.
Art is from Pokemon Sword and Shield, and the battle music is by Toby Fox.
I just did the coding.
#12 Chromedon Fight
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- 2016.5.13
#13 Undertale Gorilla Battle G Route
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- 2021.9.16


Controls:
Press Z to confirm and progress the conversation. Press X before starting to skip dialogue. Use the arrow keys for basic movement. Press A or B to change the music.
This battle is very difficult—the creator cleared it in 10 tries. The quality might not be the best, so please be kind. Let them know if you find any bugs. The creator will add "Act" and "Mercy" commands, but no specific date is set.
Special thanks to Toby Fox, the creator of Undertale, for allowing fan creations under certain rules.
#14 Bad Time Duo/Double Bad Time
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- 2020.1.19


Controls:
Arrow Keys: Move
Z: Continue speech
H: Use items
Attack Guide:
White: Dodge
Blue: Stand still
Notes:
- This project doesn't use Sans attack creator.
- Based on SIL's animation.
- Lag can cause desync with music.
- Infinite HP mode is not available.
- Credit if remixing.
Credits:
- Toby Fox and Temmie Chang (Undertale)
- SIL (Animation)
- Sprites and scripts from various creators
#15 ScratchTale
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#16 The Notorious Tabuu from Smash Bros
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Invades Ante: An Oddly Perfect Match Between the Subspace Ruler and Ante.
Tabuu, the most formidable enemy in the history of Smash Bros., has arrived in Ante! The compatibility between the ruler of Subspace and Ante is strangely good... Tabuu's signature attacks are incredibly dense, making the game ridiculously difficult! I can't clear it at all^^; I can't help but wonder how on earth to dodge those wave-like attacks that resemble rings of light! They're so powerful that even a Kanto person might involuntarily let out a Kansai-style retort. Seriously, is there anyone who can clear this?
#17 Swap! Good time trio Remake! +bonus! [Undertale fangame]
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![Swap! Good time trio Remake! +bonus! [Undertale fangame]](https://scratch.coach/wp-content/uploads/2022/06/346698647-276x206.jpg)

Controls:
Arrow Keys: Move
Up Arrow: Jump (Blue Soul mode)
Space: Recover
Attack:
Blue: Stand still
Orange: Move
You can change game modes or HP in the menu. Some attacks may include flashes, so please be careful. Credits are in the game.
Thank you for playing!
Credit:
- Undertale by Toby Fox
- Swapfell by kkoppang
- Swap! Good time trio by UnderKoopa757
(and more credits listed)
This is my final game. It's been 2 years since I started Scratch. Thank you for your support!

#19 ```plaintext
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Summary of the author's notes
A healing item that appears when you fully upgrade the kunai or soccer ball. It restores 20 HP. Use it when you're in danger. All items and equipment in ver.2 are listed here. We'll keep adding more through updates, so stay tuned! Remixes are welcome. If you're proud of your remix, promote it in the comments, but unrelated or


![[OverSave-Tale] Bad Time Trio HARD MODE by FDY](https://cdn2.scratch.mit.edu/get_image/project/603217485_282x218.png)
#23 The Muffet Battle Updated
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How to play
Action | Key |
---|---|
Move up | UP key |
Move down | DOWN key |
Move up | UP key |
Move down | DOWN key |
Move up | UP key |
Move down | DOWN key |
Move up | UP key |
Move down | DOWN key |
The standout feature of this Scratch game is its battle system where players move up and down to dodge three types of random attacks! You control a heart displayed in the center of the screen using arrow keys, avoiding bullets flying in from the left. Your health starts at 20, and while you take damage when hit, it auto-recovers every 20 seconds to handle prolonged battles. What's particularly clever is the invincibility frames - you become briefly invulnerable right after taking damage, preventing cheap consecutive hits. Survive 100 attacks and you win! Complete with music and voice lines that really capture the atmosphere.
#24 Exciting Undertale Adventure
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Hey everyone, do you know the game called Exciting Undertale Adventure? You move the character with the arrow keys, and if you bump into the white frame, you'll be sent back to the center. Watch out! If your health drops to zero, it's game over! Also, if you stay still for 2 seconds, you'll take damage, so it might be better to act quickly. By the way, the game over music seems to be credited to Mr. Toby Fox. And there are many others involved too. For instance, there's @chibisuirakikito and @osakanatengoku who helped with Undertale's Muffet and the game over screen, @WASABI0123 who provided commands, and @kinngusann who crafted the slash. The inspiration came from @ritumario's Undertale Character Battles. So, if you're interested, definitely give it a try!

asgore
The popular asgore in Scratch




asriel
The son of Asgore and Toriel! He’s good friends with the protagonist! But they end up fighting!





alphys
Alphys is a big fan of Undyne. She’s a scientist who researches various things like souls and determination. She has a dinosaur-like appearance at first glance.
The battle with Alphys is considered to be the most challenging even in Ink Sans battles, so you can imagine the difficulty level…



void termina undertale
Here comes the final boss of Kirby Star Allies, the strongest and most soul-crushing destroyer, Nil! Personally, I really like his fourth form, which looks like a bowling ball. I kind of wish there was a collaboration with the bowling industry, haha.


toriel
The popular asgore in Scratch





papyrus
Papyrus is a lovable guy who wants to become popular like his brother Sans and be kind-hearted like Undyne. He’s such an endearing character!




flowey
The popular asgore in Scratch


mettaton
Mettaton, the TV star created by Alphys, is a formidable opponent who attacks through quiz shows and more! He has the ability to transform and become even more challenging, such as with his EX and NEO forms.



meta knight
The popular asgore in Scratch
