>>35866440It learns Dazzling Gleam too, which would be slightly stronger than Signal Beam. But even then, according to the Showdown damage calculator, an Umbreon trained in Special Defense is bulky enough to survive 3 Dazzling Gleams, even if Espeon has Specs (without Specs, it'd take 4 hits to KO Umbreon). Meanwhile, Umbreon can 2HKO Espeon with Foul Play, so Umbreon would win that matchup.
