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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.
* EldritchAbomination: [[spoiler:Gransphere, the final form of the Spheres and an unbelievably massive PlanetEater. Making it even more so is it appears more as a living black hole most of the time than anything remotely normal. Even when its true nature is seen, it's distorted and warped compared to the normal ones, constantly shifting. When it's finally killed (after eating most of the solar system), it's death opens up a dimensional rift and Dyna spends quite some time wandering the multiverse after being sucked in.]]
* 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.