Who said "Even echidnas get tired sometimes, and that's okay."?

This quote is attributed to Knuckles.

Even echidnas get tired sometimes, and that's okay. - Knuckles

"Even echidnas get tired sometimes, and that's okay."

Knuckles Solitude

"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!"

"Sometimes being the best means being the loneliest."

"Solitude gives us time to reflect on what matters"

"I'm not good with people, never have been."

"I feel like I'm disappearing."