I don't do narratives, so I'll keep my descriptions simple and to the point, with some examples from the anime mentioned for reference.
In my story, I portray Bubble as being a stream of foam, similar how Satoshi's Kingler used it in the anime shortly after it evolved. I personally like this portrayal, and it's a pity it doesn't look that way in the anime again, because it so nicely tells you several factors: it's one of the weakest water-type techniques out there, it's different from Bubblebeam (which I personally would portray as it's shown in the anime), and it's capable of slowing your opponent down (in my case, I make the suds stick to the opponent's body to make their movements more sluggish).
Super Fang is an interesting one, since you somehow gotta make the technique look powerful, yet never capable of completely taking out the opponent. Super Fang's main point is that it's able to cut HP in half, but if HP is just a status in a video game, how are you supposed to portray it realistically? Well the way I see it, in real life, HP could translate to stamina or life force, so it's just a matter of making the technique look as though it wiped out a huge portion of that. Personally, I'd make the Pokemon's front teeth glow white before stabbing into the opponent. A few seconds later, the opponent's eyes, mouth, as well as open wounds like the one just left by the fangs, start to glow white. Afterwards, an explosion comes out of the opponent's mouth, the glowing stops, and the opponent's left momentarily sitting with its mouth smoking (I compare it to Satoshi at the beginning of the Jouto filler featuring Tsubotsubo, in which something similar happens to him after taking an explosive pill). In this case, the attack's portrayal manages to give off the idea that it triggered a small energy explosion that caused internal damage, serious enough to wipe out much of the opponent's vitality, but not serious enough to keep them from going on completely.
Oh, and for the record everyone, Faint Attack's Japanese name translates to "Sneak Attack" or "Foul Play". It doesn't actually involve "fainting".