The crown generators are actually fake and download a keylogger (password stealer) and trojan onto your PC, after making money from you in advertising revenue by making you do surveys before the download.
It is literally almost impossible to exploit a massive online multiplayer game. Attempts at exploitation are very, very easy to detect and ban the player for.
Crowns are a premium item in the game which require payment. Taking something without payment is an act of theft, even if it is online. You may be prosecuted for this theft (or attempting to steal, since the generators are fake anyway).
There are many posts in the Wizard101 forums warning people not to fall for the crown generator scams.
You do not want a crown generator. It is against the rules, and it's stealing which is illegal. You could get in a lot of trouble and it's better you don't attempt this
Please do not attempt to find, use or create a crowns generator. If you used one it would be getting an item that costs money for free. That's stealing, that's illegal. You could get in trouble for it, and it's really not worth it.
SUPERVISORS - This is a software licence violation catch-all. Please do not split alternates.