Shock Ability

The first 4 pairs of bytes are pointers to animation scripts, regrouped by layer or sprite script. In order to get what you want, use the same value at the same place as another spell with the bubble effect. You can also change the scripts themselves but it's more work.

That's just it; there are no other spells with the bubble effect. The Bubble effect only seems to be used by special attacks by monsters and by items themselves, not other spells. I actually wouldn't mind the vanish spell effect, but the character starts to turn invisible before they suddenly have the image appearance instead.