There's a bug on Showdown which I think is related to Scrappy.
Ion Deluge usually turns all normal moves into electric moves, making it so that it triggers all the electricity based abilities, but more importantly so that it can't hit ground types.
However, when paired with a Pokemon that has Scrappy, the electric move will go through any ground type/subtype.
I have a replay of this happening, it's pretty short, but the Exploud's Boomburst hits both the Diggersby and the Whiscash, which shouldn't be happening.
http://replay.pokemonshowdown.com/vgc2014-155528243