When this card is Normal Summoned: You can add 1 "Gagaga" Spell/Trap Card from your Deck to your hand. You can target 1 other "Gagaga" monster you control; the Levels of that monster and this card become their combined current Levels, until the end of this turn. You can only use this effect of "Gagaga Sister" once per turn.
use Gagaga Academy Emergency Network to Special Summon either Gagaga Magician or Gagaga Girl, then Normal Summon this card, use its effect to search Gagagawind, use Gagagawind to Special Summon the one you didn't Special Summon with Network.
Now you have access to any Xyz from Rank 1 to 10, with 2 or 3 materials.
But first, do we get Gagaga Girl in the new main box?