Volume 25 Bonus Chapter (and Extra Illustrations) : r/OnePunchMan

One-Punch Man - MangaDex

Volume 25 full look. : r/OnePunchMan

Chapter 31, One-Punch Man Wiki

Volume 25 Bonus Chapter Translated : r/OnePunchMan

Chapters and Volumes, One-Punch Man Wiki

Volume 25 Bonus Chapter (and Extra Illustrations) : r/OnePunchMan

Art] One Punch Man Volume 20 Bonus Illustration One punch man, One punch man manga, One punch man anime

Volume 23 Illustrations [HQ] : r/OnePunchMan

Volume 29 (Bonus Art) Clean & Upscale By Me : r/OnePunchMan

One Punch Man

Changes and Redraws in Volume 24; compared to the online releases. There were only 4 since the chapters were already redrawn, description of the changes is under the images. : r/OnePunchMan

Chapters and Volumes, One-Punch Man Wiki