This is a collection of 7 filters and a master mixer (all built as nodegroups), that will allow you to incorporate these into your shots! All you do is append the one you want or the master mixer, which contains the lot. All of these are fully compatible with Eevee as well - I just developed them in Cycles, because of the preceding product - Motion Smear.
Setup tutorial here: https://www.youtube.com/watch?v=7wddvwqGnRU
The filters are
Linear Lines Follow the sketchy style, but is all linear - the same direction. You can rotate it too and the effect is nothing short of incredible!
Centralized Lines More typical anime impact frame, this one starts from a single point on-screen. Don't be afraid to adjust your image contrast for varied degrees of brightness - these effects are quite versatile! You can animate the origin and I included a special aim output to the node to help you do just that!
Inversion Common photo negative, with some additional controls, like value above 1, to make your contrast higher, for example.
White Background Glow A staple of slow motion shots, the white background with the glow, can also make for a wonderful flash frame or set of impact frames themselves - a personal fav!
Darkened Background This usually precedes the main impact frames, so it had to be included. Sometimes, in action, you want to set the focus on the action taking place, like a punch, shot fired or whatever, and then you want all to go quiet visually, and that's where this comes in!
Flash Frame This is what I would call a transitional impact frame. Sometimes when you go from image to impact frame, the transition can feel a bit too harsh, quick or jarring, especailly at higher frame rates, but this transitional frame filter should cover that bridge. I recommend preceding or following it with a fully white frame.
Normal Rotation One of my personal favs, this one is trippy. Inspired by many flashing impact frames, this one has a wobble and linear option. Sometimes you want direction to play a part in your impact frames - you usually do, lol, and this one's linear feature facilitates that (again, you can rotate it) and the wobble texture let's you hit water or something else that's of a different substance than hard surfaces, and still make a great impact.
I've taken the liberty to upload them separately and compile all the blend files into a zip, for convenience as well.
The Master Mixer The mixer allows you to set up your frames the way you want them - inside - and then you can animate the factors between them as your sequence runs. It just makes it easier to animate than setting up a bunch of mix nodes yourself. I do recommend that you only have 1 factor active at a time - this may have an affect on render speed.
Demo Scene: A simple scene with suzanne in that you can use to practice putting the nodes into. Feel free to animate it in creative ways! These are fully compatible with Eevee, so have fun! BONUS! Colored outlines - normal based - and the color is generated with the image itself!
CAUTION: Be aware that these kinds of effects (especially the normal rotation one) can have an influence on people with photosensitive epilepsy. Be aware of that and follow your country's recommendations (if they have any), in warning your audience! :D