Ballistic Salvo
What do you think?
Iron Fist of Kung Pao or General Tso or whatever it is.
As they say, “A noble spirit embiggens the smallest man.” So might I suggest that Embiggened Bash is a perfectly cromulent entry into the annals of best attack name.
No contest: “Nuts from above” is best, followed IMO by “Insult to injury”
“I got a plan” needs to be in the mix. The name by itself isn’t much, but when you think about it in Rocket’s sense from the movie (“…and I need that guy’s leg”) I crack up every time I see it.
Onslaught & 
Diabolical Plot really fit the characters!
I’ve really always loved A Little Off the Top. It only dawned on me much later that this spells out A LOT (or A LOTT, depending on whether you count the “t” in “the”).
Whales, Whales, Whales!
Everything you need to know is right there.
Or “Ants, ants, ants”?
i dunno about attack name, but i’ll miss the old description of squirrel girl’s green, that confirmed every character was wearing pants
sigh…
I am Groot… self explanatory.
I’m a big fan of “righteous uppercut”
marc
Full Blast is simple, and lives up to its name, especially boosted.
It’s a skill name you can set your watch to.
I’m gonna say:
Surgical Strike or Blammo! We Got Ya!
Both are very accurate descriptions of what happens. Blammo! wouldn’t be as good if there wasn’t a fist coming out of the screen at you.
Maggia Prawns
Makes me hungry every time it resolves
Masterstroke.
the naughty minds know why I giggle when this power fires 
Feral Clothes! Oh, wait, I mean Feral Claws!
But actually, apart from the ever-glorious Nuts from above, it’s Thunder Strike. Because for some reason I always, always read it as Tsundere Strike which makes me think inappropriate things about the mighty god of thunder. 
I like Scarlet Witch’s power names - Reality Crush sounds like a J-Pop band name, and Hex Bolt is just a pleasing combination for words for me for some reason. I also like the body synergy with each of Devil Dino’s abilities.
i love how the screen fades out and in again to reveal a missing opponent
Beam me up Scottie! 
Shocked “Avengers Assemble” has not been mentioned.. one of the most iconic lines in Marvel history, and the ability does what it should, calls in the Avengers.. perfection in a power.