Who said "I've learned that being alone makes you stronger."?

This quote is attributed to Bowser.

I've learned that being alone makes you stronger. - Bowser

"I've learned that being alone makes you stronger."

Bowser Solitude

"I'm not just some bad guy - I'm the king of the Koopas!"

"You think you can stop me? I have an entire army!"

"I didn't come this far to lose now."

"Fear me, for I am unstoppable!"

"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."