While on the road to Ecruteak Ash and co. encounter Gary having a battle with a boy named Alex Davis. While Alex uses his Alakazam, Gary uses his Umbreon, which Ash now realizes it was the same Eevee Gary had. After the battle Ash attempts to impress Gary with his new Johto pokemon only to be ignored. Later, as Ash and co. eat at a nearby town, the lights go out and the entire city is pitch black. Will Ash be able to stop the blackout? And will Ash finally get the respect he deserves?
Since Eevee evolves into Umbreon at night it can be assumed that Gary evolved Eevee prior to this episode at night between OI035 and this episode.
The power plant worker with the glasses was called Mike.