Aku (Samurai Jack) vs. Vaatu and Unalaq (Legend of Korra)

[The Arbiter]

Full power Dark Avatar vs. The Shogun of Sorrow.

Which evil spirit will win?

[T-1000]

I love this fight but Unalaq has no chance. Unless there's some Dark Avatar trick he can pull to trap Aku in the Spirit World, Aku will eventually get him. Being able to bend the four elements give Unalaq a lot of options for attacking and evading Aku's shape shifting but none of them will actually hurt Aku.

[Firefist Norrin]

I love this fight but Unalaq has no chance. Unless there's some Dark Avatar trick he can pull to trap Aku in the Spirit World, Aku will eventually get him. Being able to bend the four elements give Unalaq a lot of options for attacking and evading Aku's shape shifting but none of them will actually hurt Aku.

There's actually no evidence Unalaq could bend anything besides water. I'm pretty sure the Avatar can only bend all four because Wan visited each lion turtle and then bonded with Raava.

I agree this is a stomp in Aku's favor.

[The Arbiter]

I meant the enormous red spirit version of the guy from when he surged Republic City, if that helps.

[Fallman]

Some? At that point, only having waterbending matters less, but Aku still has crazy power on him. The Anti-Avatar can probably hurt him, but Aku is unlikely to drop in one shot, so at best it's a brawl against a very slippery shape shifter.

As far as types of bending go, Wan only used one form of bending at a type and Raava held on to the other types until she switched them out. Vaatu wasn't, as far as we know, holding onto any other type of bending when he was merged with Unalaq.

[The Chou Lives]

Aku wins. Sky Fathers could not kill him and in the future without Jack killing him, he went onto space, screwing up tons of worlds and collected aspects back on Jack’s Earth.

The Avatar baddies do not have that potency.

And Aku has MANY tricks. Could time warp them away, kill via heat vision, insane shape shifting and so forth.