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''Ultraman Dyna'' is a {{toku}}sastsu series that ran from 1997 to 1998, part of the ''Franchise/{{Ultra|Series}}'' franchise. It functions as a sequel series to ''Series/UltramanTiga'', set seven years after the series' end. Mars and other worlds are being terraformed and a new team, Super GUTS, has been made to combat various threats. Shin Asuka, a light-hearted member of the team, becomes Dyna's host when the [[BigBad alien Spheres]] come to invade Mars. Now, he fights for the Neo Frontier whenever he is needed, either as a Super GUTS agent or as Ultraman Dyna.

A film set during the series, entitled ''Ultraman Tiga and Ultraman Dyna: The Warriors of Starlight'' was produced. Dyna[=/=]Asuka also returns in the later films ''Film/MegaMonsterBattleUltraGalaxyLegends'' and ''Film/UltramanSaga''.

!!''Ultraman Dyna'' provides examples of the following tropes:

* BigBad: The Spheres.
* BunnyEarsLawyer: Despite his immaturity, Asuka is a capable and courageous fighter.
* CombiningMecha: Smaller Vehicles to Bigger Vehicle kind with the Super GUTS Machines, Alpha-go, Beta-go and Gamma-go combining to become the GUTS Eagle.
* DarkIsEvil: Fake Dyna's Solgent Ray has dark color.
* DisappearedDad: Asuka's father disappeared years ago in a mysterious light. [[spoiler: He is joined by Asuka in the final episode.]]
* DoppelgangerAttack: Miracle Type provides this.
* EvilCannotComprehendGood: Alien Gregorl thought he could replace Dyna should he beat Dyna in a CurbStompBattle, and got really confused when people start to cheer for losing Dyna.
* EvilKnockoff: [[spoiler:A well-intentioned but misguided variation with Terranoid. An artificial Ultraman created under the F-plan of TPC in order to eliminate dependency on Dyna. Terranoid's body gets taken over by the Spheres and was used as a weapon.]]
* HenshinHero
* HumongousMecha: Mountain Gulliver n°5
* LighterAndSofter: Compared to ''Series/UltramanTiga''.
* MightyGlacier: Strong type.
* MirrorMatch / EvilTwin: Alien Gregorl took form as Fake Dyna.
* MonsterOfTheWeek
* MultiformBalance: Dyna has three forms: Flash type (base state), Miracle Type (multiplication powers) and Strong Type (increased strength).
* PluckyComicRelief: Shin Asuka functions as this, the first protagonist in the ''Franchise/UltraSeries'' to do so.
* SequelSeries
* {{Terraform}}: The Neo Frontier is a project to colonize the solar system.
* TransformationTrinket: The reflasher.