Please be aware that searching for and using "cracked" or pirated software with a serial key can pose risks to your computer's security and potentially lead to malware infections. It's always recommended to use official, legitimate software versions.
Here's a to download MiniTool Partition Wizard Free:
Regarding your search query, I couldn't find any legitimate "serial key" that can unlock the full version of MiniTool Partition Wizard for free. The company offers a free version, which can be downloaded from their official website.