Happy Metal bands?
 

Does such a thing exist? It came up in my mind when listening to this kirby metal cover: https://www.youtube.com/watch?v=FuEFR0On2M8.

Which reminded me of the ''Happy Black Metal'' and ''Happy Deathcore'' joke videos by SteveTerreberry, but you see, the first one of those actually sounds pretty cool.(The latter just sounds like ''easycore'' style pop punk, which makes sense. But most ''easycore'' bands suck ass.)

I know of happy sounding while still aggressive Punk, but I don't really know of happy extreme metal. Not that I've listened to that much metal.

edit: In case you don't know what I mean by happy punk, I have some examples. this early 2000's street punk band uses happy sounding chords a lot. https://www.youtube.com/watch?v=Pb3vdKs_Wg4.
'"Crack Rock Steady'' style Ska Punk bands often use happy chords, even in their non ska songs. https://www.youtube.com/watch?v=fyvYyOGst1I, is an example, or
https://www.youtube.com/watch?v=bjKA8f30Fxg. Speaking of which, ska punk in general sounds very happy, so in the punk parts they still usually use happy chords.
Lastly, pop punk bands with some aggresive vocals , like Direct Hit! https://www.youtube.com/watch?v=DFxVmRi-ZQo.

Check out the most recent melt banana album "fetch".
Not sure if it qualifies as metal, but it's pretty ****ing heavy punk flavoured stuff.

never been that into heavy metal.

..I like the instrumentation, but damn, those vocals would reeally take some time to get used to.
It's not happy metal, but it is..happy noise rock/noisecore. Never thought I'd hear that. I think I'm going to check them out.

I'd say Birdflesh qualify:

I think Sigh sounds kind of happy and they're QUITE avant garde/extreme. A lot of those metal bands that utilize classical horns played in a big band style sound pretty damn happy to me.

Darth Vegas came to mind, although they are only partly metal.

There's a lot of happy party thrash out there, bands that sing primarily about drinking and breaking ****. Municipal Waste was pretty easygoing music, Tankard, Cross Examination, Dr. Living Dead, Lich King, Gama Bomb, and a bunch more. Classic metal was pretty happy most of the time, Saxon, Judas Priest, Manowar, Motorhead, songs about driving, drinking, drinking & driving, smoking, smoking & driving, bangin', headbangin', partying etc.

I found a real black metal song in major, it's pretty damn happy. https://www.youtube.com/watch?v=RvfQqJeNF08#t=49