This series of cartoons was created in conjunction with the Office of Scholarly Communication, Cambridge University Library. They are based on the stakeholder analysis (https://doi.org/10.17863/CAM.36053) carried out by the Data Champions Programme. They are designed to be used as advocacy materials in promoting good research data management (RDM) practices, the Data Champions Programme and central RDM services. Details of the process for creating the postcards can be found in the blog post "Cartooning the Data Champions" (https://unlockingresearch-blog.lib.cam.ac.uk/?p=2338). The different scenarios are detailed in the README file. These cartoons were used with the RDM template postcard to create a series of postcards.