HM05 Flash

Lowers the target’s accuracy by one stage.

FireRed

Route 22 GateOak's Aide

Given after catching 10 Pokémon

Gift

LeafGreen

Route 22 GateOak's Aide

Given after catching 10 Pokémon

Gift

Ruby

Route 106Granite CaveHiker

A Hiker gives you HM05 Flash, which lights up dark caves and is a Normal-type move in battle.

Gift

Sapphire

Route 106Granite CaveHiker

A Hiker gives you HM05 Flash, which lights up dark caves and is a Normal-type move in battle.

Gift

Emerald

Route 106Granite CaveHiker

Gives HM05 Flash. Lights up dark caves; drops the target's accuracy in battle.

Gift