However, in order to overcome Dai-Gurren for good, the energy required would most likely destroy the universe in the process.
When Viral was recruited by Simon as Gurren's pilot, the helmet recognized Viral as its original owner, and gave him the lion's share of its power, undoing his Badass Decay - and then some.
A strong-willed human can help them suppress this drive, either through intense focus or Everstones- which are bits of The Will's unit, Grand Zamboa, still rich with Spiral-suppressing energy.
In turn the light beings are Spiral Knights, either attempting to prevent Nemesis, or simply an opposing faction out to increase their own spiral power.
When Dai-Gurren is trapped in alternate universes, it is heavily insinuated that the spiral power of Simon still existed.
Simply put, Pokemon store Spiral power as they fight and evolve- generally beyond their control- when they've accrued enough.
The main cast.
But in the very last episode, Nono and Lark are able to alpha lesbian a single enemy, with one degeneracy reactor and Nono's hax energy-absorber between them, that a planet-scale Buster Machine with billions of degeneracy reactors couldn't.