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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 the combined current Levels of those 2 monsters, until the end of this turn. You can only use this effect of “Gagaga Sister” once per turn.
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Can Be Found In: Primal Origin (PRIO-JP081)
Gagaga is an archetype completely open to any kind of Xyz setups. Their members although lacking stats are able to manipulate their own Levels in combination with many summoning tools for obtain any Xyz summon of our choice, making their Extra Deck much more expanded in options compared to other builds. Started with “Gagaga Magician”, right now the archetype carries a selective number of members and options to summon the right Xyz for the right situation.
"Gagaga Sister" is treated as a must staple card for the Gagaga strategy thanks to her two effects. If normal summoned, "Sister" will search a Gagaga spell or trap from our Deck, practivally either improving our performance to setup the field ready for our Extra Deck or prepare some backup. Although Level 2 "Gagaga Sister" second effect targets another member so both combine their levels, therefore able to get high level Xyz monsters with the majority of Gagaga creatures without no much more assistance. So in short, "Gagaga Sister" works as a toolbox creature with her searching effect as well Xyz or even Synchro setup after landing on the field.
"Gagaga Sister" is preferable to be normal summoned for get a Gagaga spell or trap in return, so in most situations either we have her right on the opening hand or we look for her by cards like "Onomatopaira". However if we ignore her normal summon effect, "Gagaga Sister" obtains massive number of options to be brought on the field. Right from the archetype itself, "Gagaga Academy Emergency Network" and "Onomatopia" are able to summon "Sister" right from the deck. If "Sister" is in the graveyard, the spells "Gagagarevenge" and "Gagagaback" will revive her right when the field is ready to use her leveling effect. Obviously in an archetype mostly arround Spellcasters they are able to obtain tools from the Type, going from "Apprentice Magician" or "Magician’s Circle" summoning "Sister" from the deck to others like "Magical Undertaker", "Magical Exemplar", or "Dark Renewal" for revive her back from the graveyard.
Despite her several methods to be brought on the field, unless in the graveyard “Gagaga Sister” will simply be normal summoned for get one of the many Gagaga tools ready to assist them. The previously mentioned “Gagaga Academy Emergency Network”, “Gagagarevenge”, and “Gagagaback” not only are for “Sister” but also the rest of members we might need to gather for a Xyz setup. “Gagagawind” is able to special summon members from the hand with a increased level, perfect if we want to quickly setup a high Rank summoning on early turns of the game. As more Gagaga monster accumulates in the graveyards, in late turns we can look for “Gagagadraw” so can banish creatures to obtain extra cards in our hand. Despite a Xyz archetype Gagaga themselves can go to the offensive, with “Gagagatag” able to provide an inmense boost and “Gagagabolt” able to destroy threats before performing a Xyz summon. And same goes for the defense department, with “Gagagaguard” and “Gagagashield” able to protect them from opponent actions, and “Gagagarush” negating a monster effect as well a destructive outcome along burn damage.
If another Gagaga is already on the field, pretty much we are ready for perform a high Rank Xyz summon. Usually is preferably to do it with “Gagaga Magician”, is is able to manipulate his own level to the point we can get Rank 10 creatures thanks to “Sister”. “Gagaga Caesar” does a similar job, but is also able to increase the level of “Sister” and other members so we can use them for heavier Xyz summons. Monsters like “Gagaga Child”, “Gagaga Clerk”, and “Gagaga Gardna” are able to special summon themselves by many conditions, able to arrive on the field before or after “Sister”. Last but not least, “Gagaga Girl” can be used for a Rank 5 Xyz for then weaken an enemy special summon to 0 ATK, truly devastating if we summon “Number 33: Chronomaly Machu Mech” due its unique burning and boost effects able to create a OTK as a result.
Keep on mind that “Sister” abilities can be used for other setups besides Xyz summon. As mentioned, “Sister” increasing level along other members (Except “Gagaga Magician”) can work together with Synchro summons, choosing from many Tuner options to work arround our strategy. In an archetype dominated by Spellcasters is even possible to meet the conditions of “Sorcerer of Dark Magic”, which combined with “Secret Village of the Spellcasters” can complete shutdown the opponent’s field. Spellbooks can also get on the mix of the Gagaga archetype, with “Spellbook Star Hall” able to search “Sister” and others along “Spellbook of Life” able to revive her with an already increased level.
"Gagaga Sister" is practically the core of the Gagaga strategy to the point is unfair she hasn’t come out in the TCG yet. Her normal summon allows us from getting "Gagagabolt" for destroy targets before performing a Xyz summon to looking some tools for keep the momentum on future turns. Her level effect doesn’t need any setup beforehand compared to other members, letting us obtain powerful creatures right from the start of the likes of "Number 11: Big Eye" and  "Superdreadnought Rail Cannon Gustav Max" thanks to "Gagaga Academy Emergency Network" summoning "Gagaga Magician" straight from the deck, or "Number 33: Chronomaly Machu Mech" with its OTK potential using "Gagaga Girl". Searcher and a Xyz setup (Even Synchro) creature, "Gagaga Sister" is a must for an archetype which only firepower comes from their diverse Extra Deck.
+ Searching effect of spells and traps for any situation
+ Able to setup Xyz summons of any Rank with the right Gagaga
+ Very powerful sinergy together with “Gagaga Girl” and “Number 33: Chronomaly Machu Mech”
- Searching effect only available when normal summoned
- Requires other monster(s) already on the field for her full potential