Links: ucp.php?mode=register
Here is the reasoning it gives:
MINECRAFT PASSWORD
In order to display an avatar and have access to certain forums, we must verify your Minecraft account.
Please make certain the email address you entered above is the email address you use for Minecraft logins.
This password is only used for account verification and will not be stored.
Now why on earth would the pixelmon team be asking for players passwords? There is NO reason to ask for a password, anyone with a decent amount of account security knows that you never give your password to anyone, not even to a Mojang employee.
Now I am not accusing anyone of stealing accounts, as I trust it really doesn't store the password, etc, but it's still a very shady thing to have on your registration page. Other sites (Like Enjin, etc) have ways to grab an accounts skin WITHOUT a password, so why request it here?
Again, I love pixelmon and thank the team greatly for all their work, but my community raised this question to me, so I thought I would bring it here to shed some light. Thanks!