When you talk about Gattai (combine), the most GAH ver belongs to Tengen Toppa Gurren Lagann. The most classic Gattai are Getter Robo & Voltron. But the most ENTERTAINING ver MUST BE Genesis of Aquarion (Sousei No Aquarion)!!! Now they are back to feed us eye candy with its sequel Aquarion EVOL! Watch the trailer here.