Hello!!! I've been googling and searching like mad for a script that can help me, but sadly I haven't found one. I often edit gifs in gimp, and would like a tool to remove alpha on all layers with alpa on it. I already found one for adding alpa, but the removing part is trickier. Thank you so much to everyone who'll be able to help me x)

//Midnight

It happens that there is no API for this...

If you want to remove Alpha on all layers, you can use interleave-layers to flatten all your layers on an opaque layer (use the script in "sprite" mode).

But why are you removing the alpha channel?

Oh oh oh...I know, I know.
You can use my run code on visible layers script

and run this code

I think trandoductins 'run code on visible layers script' is the only plugin that will do this.
It's a useful plugin for running python commands in Gimp.

You can easily modify the script so it always opens with the remove alpha on all layers command for anyone that wants to do this on many layers.
Just change line 86 like this.

#INPUT BEGINS
(PF_OPTION, "layergroup","Choose on what layers", 1, ["ALL LAYERS","VISIBLE LAYERS","NOT-VISIBLE LAYERS","LINKED LAYERS","NOT-LINKED LAYERS"]),
(PF_STRING, "code", "Code to Run:", "if layer.has_alpha: pdb.gimp_layer_flatten(layer)"),

"pdb.gimp_layer_flatten(layer)" alone is sufficient. Gimp does the necessary sanity checks anyway.

"Good code is not code that works, good code is the minimal code that works".