Build a multi-class machine learning based classification model for two datasets AND also write a detailed report describing the algorithms used, their working principle, key parameters, and the results.

The basic steps like data cleaning, feature engineering, etc are already done. You just need to build the machine learning predictive models from the datasets which I will provide you and do some visualisations. After that you need to write a detailed report describing the algorithms used, their working principle, key parameters, and the results obtained.