A portion of the extra reward (+25 Leaflets) is from one of the Minimites. (One is trailing behind the Paca and the other is perched on the fence.)
The other part of the reward (+50 Leaflets) is from the prompt bonus. (The Lilyp behind the Paca.)
Here's the link to my inventory with both the Minimite and Lilyp: https://play.pacapillars.com/user/AnimatedCritter/inventory