Who said "We must protect those who cannot protect themselves."?

This quote is attributed to Underdog.

We must protect those who cannot protect themselves. - Underdog

"We must protect those who cannot protect themselves."

Underdog

"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."