I have a couple.

One's for Convalescence, one's for Hallowed Ground.

"Popping Convalescence! Menphina be praised!"

"Popping Hallowed Ground! I AM INVEEENCIBLE!"

And some random silly battle cries, like:

"I am a Jedi, like my mother before me!"
"For the honor of the Black Boar!"
"There can be only one!"
"Nac mac Feegle!"