After poking around on the internet and finagling with my audio software a little, I managed to reverse-engineer the vocal effect used by WoodenToaster (Glaze) in "Nightmare Night." This is the result. Let me know what you think in the comments.

More vocal effect tests: https://www.youtube.com/playlist?list=PLvPIIIfuZDjGqov3v625fV107ecgUafgA
VoxFX Tutorials: https://www.youtube.com/playlist?list=PLvPIIIfuZDjH3C1Ql37Y7_A5IHds_8rCH

FAQ:

Why doesn't it sound exactly like Glaze?/Why does your version sound weird compared to the original?
There are several reasons. First, I did not have access to the actual project file for Nightmare Night (though I would LOVE to see that), so I had to do some "creative editing" to get my vocal to fit in with the instrumental track. Second, I am not Glaze, so I don't sound exactly like him. Third, I didn't record my vocal in the same room or with the same microphone that Glaze did. Finally, Glaze is a skilled vocalist giving a performance for a song, while I was just recording my voice to demo the effect.

What software did you use to make it?
I used FL Studio 11, using the NewTone plugin. But you can use any DAW to make it, as long as you have access to either NewTone or Melodyne.

Will you be doing a tutorial on this effect?
Here it is: https://youtu.be/sQi2YMvEqsg

WoodenToaster: https://www.youtube.com/user/WoodenToaster

The original Nightmare Night: https://www.youtube.com/watch?v=9PCEp8z7FNg

WoodenToaster thumbnail image: http://es.mipequeoponyfanlabor.wikia.com/wiki/Archivo:Wooden_Toaster.png

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