I have no idea if this is the right place to ask, but I'm doing some animation and I need a sound effect for a character who is pixelated to crumble.
You may want to take a look at a sound effect generator program, and create the sound yourself.
For example, you can use http://www.bfxr.net/, which is an online tool, no installation required.
You don't need to be an expert to create pretty decent effects. Just click Randomize until you get something similar to what you are looking for. Then you can tweak the different sliders until you get it perfect.
Since sound design is no science but art there are multiple ways to evoke a certain impression in the listener/viewer.
What I would use is a bit crusher / distortion effect used on a sine wave that pitches down.
Native Instruments has a extension pack for Guitar Rig that has such an effect unit. It is called Traktors' 12. This comes at a price of 69 EUR. There are free alternatives. Just look around. Maybe your DAW has something like it built in.