BloodRain
Knight of Retribution
Not really as he said planets in general, neither referring to the largest nor smallest. Thats not the way it works, the energy needed to destroy 15 mid planets is near whats needed for one large one. And destroying a large planet is 1/1,000,000th the energy needed for the Sun, so even if SSJ could destroy 125 large planets with SSJ3 at 1,000 large planets that would still only account for 0.1% needed.. and SSJ's only at 15 planets...
''It says that Super Saiyan 2 is twice as strong as regular Super Saiyan, and that Super Saiyan 3 is four times as strong as Super Saiyan 2.'' No, not translated by myself.
But did take a crack at it;
超サイヤ人 / 2 = Super Saiyan / 2
の2倍の強さ! = Twice the strength of..!
の4倍の強さ! = Four times the strength of..!