Great boss fight team-ups?

[Turbo Kid]

What are some fun examples of two or more characters working together to take down a powerful boss? Not counting Japanese rpgs of course as you pretty much always have a party in those games. I'll give one example.

Batman and Robin taking down Albert King

 

[Clippy]

Obligatory:

 

[poppy_]

not technically a game but whenever goku and vegeta team up is always so cool

 

[_Lorenzo_]

Hmm, the first duo that comes to mind is Chris and Sheva in RE5 when they fight togheters in many situations...

 

[Lokgamer]

Obligatory:

Damn, this was my answer

 

[KaiserMk7]

Cave Story. If y'all don't know the specifics, I won't spoil it.