City won their second successive title with 98 points, one point ahead of Liverpool.
And Walker has revealed how Guardiola's speeches gave City that extra edge they needed.
England defender Walker said: "I don't want to go too much into detail on his team talks but sometimes it is emotional because he puts everything into it.
"He remembers everything. He dedicates certain games to certain players. We go through it all together."
"I don't know he puts his all into every single game - his speeches, his emotions – they are touching sometimes.
"But what he's said before pretty much all games is that the key thing is to never give up."