While I was Pure Majin I couldn't use any skills?
Why?

Because as a pure majin yo can only use two skills that you get.

http://www.dbocom.com/skills.php?id=343
http://www.dbocom.com/skills.php?id=342
You can use this skills as pure majin

So I need to be Pure Majin and lvl 50 to use those skills, right?
To bad TW has a lvl 25 cap =p

I can still get the Pure Majin Potion and turn into on.
Although I only got the basic skill, my PL IS OVER 35000!!!! (Rofl) anyway so I can still beat SSJs easily =p