I wanted to know if you can replicate the dust effect from Undertale. If you don’t know how it looks like, here is a GIF.
the only way to do this is to use external software to animate it yourself, either by hand or some other tool (i do not know of a tool that can do this, youll have to do some research yourself)
Hi Qbix, your question reminded me of this one Any way to "destruct" an object into pieces? There was no perfect answer but there were a lot of creative suggestions that might give you some direction on this.
As far as I am able to find from some searching, this isn’t done in-engine in Undertale.
But you can do it pretty easily with a tool like Juice FX Juice FX on Steam
Thank you all for helping me 
I will try all the methods you’ve said!
Pretty sure it’s done by a shader or something, but I don’t know. I might try the Juice FX program though!
Hi,
Not a replication but just as an option for something similar: there is an extension called ObjectSlicer that could be useful. If you go to the example project for the extension Object slicer - a game example from the GDevelop game making app | GDevelop there is a transporter effect. If you tweak this a bit (removing a few unnecessary parts) and combine it with opacity tweening you could probably get something that goes in a similar direction.
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Thank you! It did work, but it’s laggy though.
Yes, the higher the number of slices the more taxing it is to the system. I would try to make it without the Physics2D behavior, which is used for the explosion extension, and move the pixels with tween. Maybe that’s smoother but I haven’t tried it myself.
Sadly it is still lagging but at least less. 
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Unless Toby Fox coded his own GMS shader, everything I can find about it indicates it is just in the assets.
I could totally be wrong, but either way it will just be easier to bake the animation as an actual animation.