This is amazing!!
Deontay Wilder has a massive fight this weekend ... but that didn't stop the heavyweight champ from hittin' up a NYC elementary school and delivering a rousing pump-up speech to the kids.
It all went down Monday afternoon at P.S. 288 -- a school for Pre-K to 8th graders -- in Brooklyn ... and the message was inspirational and heartfelt.
"I'm here to say I was just like you young guys, just in a different state in a different city, different environment. Every time I woke, there was negativity," Wilder told the kids at the event put on by the "Game of Life" program, which focuses on helping children stay out of trouble.