Here are the Pokemon that learn Flash in Flora Sky:
* Eevee: Evolves into Flareon with a Fire Stone. Flareon learns Flash at level 20.
* Vaporeon: Evolves from Eevee with a Water Stone. Vaporeon learns Flash at level 20.
* Jolteon: Evolves from Eevee with a Thunder Stone. Jolteon learns Flash at level 20.
* Glaceon: Evolves from Eevee with an Ice Stone. Glaceon learns Flash at level 20.
* Leafeon: Evolves from Eevee with a Leaf Stone. Leafeon learns Flash at level 20.
* Espeon: Evolves from Eevee with a Sun Stone. Espeon learns Flash at level 20.
* Umbreon: Evolves from Eevee with a Moon Stone. Umbreon learns Flash at level 20.
* Growlithe: Learns Flash at level 34. You can find it in the Obsidian Fieldlands.
* Arcanine: Evolves from Growlithe with a Fire Stone. Arcanine learns Flash at level 34.
* Ponyta: Learns Flash at level 34. You can find it in the Obsidian Fieldlands.
* Rapidash: Evolves from Ponyta with a Fire Stone. Rapidash learns Flash at level 34.
* Lickitung: Learns Flash at level 34. You can find it in the Obsidian Fieldlands.
* Lickilicky: Evolves from Lickitung by leveling up. Lickilicky learns Flash at level 34.
* Pachirisu: Learns Flash at level 37. You can find it in the Coronet Highlands.
* Luxio: Learns Flash at level 37. You can find it in the Coronet Highlands.
* Luxray: Evolves from Luxio by leveling up. Luxray learns Flash at level 37.
* Staryu: Learns Flash at level 45. You can find it in the Cobalt Coastlands.
* Starmie: Evolves from Staryu by leveling up. Starmie learns Flash at level 45.
* Mareep: Learns Flash at level 47. You can find it in the Alabaster Icelands.
* Flaaffy: Evolves from Mareep by leveling up. Flaaffy learns Flash at level 47.
* Ampharos: Evolves from Flaaffy by leveling up. Ampharos learns Flash at level 47.
Remember that these are just the Pokemon who can learn Flash in Flora Sky. There may be other Pokemon who can learn it in other regions or at higher levels.