Who said "I may be stubborn, but that's my strength."?

This quote is attributed to Knuckles.

I may be stubborn, but that's my strength. - Knuckles

"I may be stubborn, but that's my strength."

Knuckles Strength

"I'm the last one standing!"

"Gotta protect this Master Emerald!"

"Nobody messes with the Master Emerald while I'm around!"

"I may not be the smartest guy, but I know what's right!"

"Strength comes from within."

"A woman should be proud of who she is."

"A strong woman can overcome anything."

"The only thing I'm good at is killing."