Who said "I fight for those who cannot fight for themselves."?

This quote is attributed to Underdog.

I fight for those who cannot fight for themselves. - Underdog

"I fight for those who cannot fight for themselves."

Underdog Justice

"There's no need to fear, Underdog is here!"

"When criminals in this city play, to steal the night and rob the day, they're out to make a dreadful mess, then Underdog is on the case."

"I'm just a pup who loves to help those in need."

"Even the smallest among us can make a big difference."

"Justice must always prevail."

"You think I'm just some animal?"

"Fighting for what's right never gets easier."

"Justice is worth fighting for."