[[WMG: Film/{{Flubber}} is a manifestation of Getter Rays]]
It's green, sentient, physics-defying, has the ability to split and recombine itself, shows an interest in mimicing humanity, and is used as a source of power for vehicles. Not to mention it was let into the world by a MadScientist.

[[WMG: The Getter is responsible for the creation of [[Webcomic/GirlGenius Sparks]]]]
It spreads to new realities by influencing their inhabitants until one of them succeeds in creating a Getter Robo. Its pilots may also be Sparks, given that the few who can bring out the full power of a Getter tend to be mentally unhinged.

[[WMG: All versions of Getter Robo exist as AlternateUniverse versions of each other]]
Based on the endings of ''New'' and ''Armageddon''

[[WMG:Alternatively, what we seen at the end of ''Armageddon'' were:]]
[[spoiler: Previous incarnations of Manga/GetterRobo, including some we had never seen]]. Some bits of dialogue seems to support that.
** This leads to theory that [[spoiler: Manga/GetterRobo Universe is resetting itself]].

[[WMG: Manga/GetterRobo Universe/Multiverse is connected with TabletopGame/{{Warhammer 40000}}.]]
And dimension at the end of ''Armageddon'' is Warp - red/purple background and monsters with human features on hon-human bodies that wouldn't stand out in Warhammer 40.000 sorta leave that impression.

[[WMG: Getter Rays are emitted by a [[Anime/GaoGaiGar G-Stone]].]]
Green, fuels a SuperRobot and makes it even stronger when the pilot goes [[UnstoppableRage completely]] [[HeroicResolve over]] [[ScreamingWarrior the top]]? Of course. Coincidence? Probably not.
* Confirmed, sort of, in Alpha 3. They, along with [[Anime/GoShogun Beamler]], Psychic Power, [[Anime/GunBuster STMC]], Anima Spiritia and [[Anime/SpaceRunawayIdeon Ide]] are aspect of Akashic records (fate).