When I saw Dendyn Dynasties a couple of years ago I remember being really impressed with the fight scenes (well that was the whole animation).
Good luck -- not an animator :P can't help ya out.

key out the important frames then just keep adding inbetweens. start with almost rough storyboard animation to get the timing right, then start adding more and more frames and eventually all the easing in your frame by frame animation should become natural and smooth if you think about it while you're adding inbetweens

his secret:

line tool

Ryanide is a freaking prodigy at action sequences, shame he hasn't submitted a lot around here lately.

Using many different angles is what I usually see to have best effect...
Yeah, I hate making action scenes too... I'm too lazy to start doing sooooo much fbf.
Once I'm doing it it's no problem... But I still haven't made a single successful fight scene.

You look like you're going to, though! Go for it!

Oh wait, I didn't say anything helpful, did I? D:

Don't use stick figures, use roughly sketched outlines of the character. Less time consuming. Focus more on the fight then details. At this point nobody cares about the background. Also, adding shadows isn't imperative the characters are moving so fast it's hard to notice. I like to grab what ever the weapon is, and preform the same stunts (if I can, not jumping off walls into a back flip stuff) to sync my mind in with what I want. Doing this also removes bad positioning in the Flash. All of these things will give you more time to make in-betweens which will improve the look of your animation. Easier? Sort of, definitely less time to create a better looking scene.

Sweep the leg

Yeah Ryanide is just fucking ridiculous, his action scenes are fantastic and he just never finishes shit.

when you're having trouble animating something like a backflip, do it in front of a mirror and remember the way you looked like while you were doing it

and ignore the guy hidden under your bed with a camera in his hand

I think you misunderstood me.

Using the line tool means faster production and no loss of motivation when animating large sequences which action scenes take. Although things get more wobbly ect .

For example Hulaloo (who I like for the record)

http://www.newgrounds.com/portal/view /504283 (line tool)
http://www.newgrounds.com/portal/view /506724 (brush tool)

It works if you're doing anime which gives you an excuse to have flailing people ect. Ryanide's work consists of tons of quick movements which is clearly a mimick of the Japenese strict regulation to keep things consistant so not much comic exaggeration is given in the fight scenes. Angles and timing come with practice which if you're doing animation on a fast pace you will hit the mark eventually.

Full bodied detailed characters drawn carefully with the brush tool? Painful and anyone would hate doing it although imo it looks tons stronger than line tool stuff.

In Russia, action sequences hate you.

Buy a camcorder then, cheap and works for this kind of thing. Put it at different angles while you act it and there you go. Don't use the line tool in fight scenes, it just ruins it in my opinion. If it is to sharp it doesn't have that rough blurry effect that fight scenes should have. I don't know if that makes sense, I can only hope it does. Looking forward to Exile IV.

Eh, I'm not good at fight scenes myself, so I can't offer much advice. I think one of the guys who posted here was onto something, though. Just drawing quick sketches to get the movement down seems like it'll work. I'm gonna try that.

I'm up for that ^^^^

Wow, you just ruined the whole episode....
Jk, but you did taint the surprise. Sounds awesome, can't wait.