Iro Hero

Absorb bullets by pressing RB to change color ship to same as the bullet color. Once enough is absorbed, tesla shock skill will be available. Press X to use it.

Full achievement walkthrough here:

This isn't exactly intuitive. By using or , you can change your ship between blue and red. Your ship gets damaged by the opposite color, but absorbs bullets of the same color. To easily get to 100, work up to the first boss, then switch to blue and just keep absorbing bullets. The blue laser can't hurt you when you're blue, either.

To get the Tesla Shock achievement, you need enough absorbed bullets, and then press . You have to absorb bullets to charge the Tesla.

To be clear, this does not have to be done one GAME, just don't quit out of the game. Otherwise the total accumulates across plays.

Press to change the same color as your enemy. Absorb their bullets until the Meter Fills (Lower right hand side of screen)
Once it's Full. Press to use the Tesla Shock
Full Video Guide🏆: