"Gimmick Puppet Egg Head" and "Gimmick Puppet Dreary Doll".
"Gimmick Puppet" (ギミック・パペット Gimmikku Papetto) is an archetype of Machine-Type monsters that are used by Quattro in the Yu-Gi-Oh! ZEXAL anime. They are a sub-archetype of the "Puppet" archetype. The monsters and associated cards are geared towards Summoning Level 8 monsters to Xyz Summon their ace monsters, "Number 15: Gimmick Puppet Giant Grinder", "Number 40: Gimmick Puppet of Strings, and "Number 88: Gimmick Puppet of Leo".
"Gimmick Puppet" monsters don't have high ATK (the strongest being the level four "Gimmick Puppet Egg Head"), but have effects ranging from stalling, swarming and even Summoning monsters to the opponent's side of the field for effect manipulation. Their main strategy seems to be taking advantage of the opponent's monsters with high ATK to deal Effect Damage with their ace monsters, "Number 40: Gimmick Puppet of Strings" and "Number 15: Gimmick Puppet Giant Grinder". "Number 88: Gimmick Puppet of Leo" offers an alternate victory strategy with its effect. "Gimmick Puppet" monsters tend to be high Leveled and can easily Special Summon themselves while maintaining a strong defense, enabling the Xyz Summon of the Rank 8 "Numbers" that part of the archetype. However, many Gimmick Puppet monsters have effects which greatly restrict the summoning of their player's monsters, forcing the player to summon them in very specific ways.
Initially, the only "Gimmick Puppet" monsters used by Quattro that were released were "Gimmick Puppet Dreary Doll", "Gimmick Puppet Magnet Doll", "Number 15: Gimmick Puppet Giant Grinder", "Number 40: Gimmick Puppet of Strings", and "Number 88: Gimmick Puppet of Leo", however the TCG release of Number Hunters brought with it most of the archetype's remaining Monster Cards, making a pure "Gimmick Puppet" Deck possible.
Gimmick Puppet OTK
The Gimmick Puppet OTK is made by summoning "Gearspring Spirit" and using its effect on an Attack Position monster, Xyz Summoning "Number 40: Gimmick Puppet of Strings" ("Gimmick Puppet Dreary Doll" can be used), equipping it with "Stoic Challenge" and attacking the monster with 0 ATK for (at least) 8400 damage.