What does flash do in Pokemon Yellow?

Answer 1

Teach it to a Pokemon, then select the Pokemon you taught it to in the party and select Flash.

Answer 2

when flash is used outside of battle, it makes a dark place, specially caves, to lighten up. if flash is used in a battle, the skill makes the accuracy of the target enemy fall.

Answer 3

If you're in a dark cave and can't see use flash to light it up.

Answer 4

powers up your pokemon when hit by a fire attack

Answer 5

you give it to the pokemon as a move than in a dark cave you use it to bring light.

Answer 6

Flash lights up dark caves. In battle, it lowers the opposing Pokemon's accuracy.