Teach a move to a Pokemon that can learn it via HM and then, after defeating Falkner in Violet City, select that Pokemon in your party and select Flash to light up dark caves, such as Dark Tunnel.
Use the HM Flash this is given by the sage at the top of sprout tower.
there are many MANY Pokemon that can use the hm flash in Pokemon sapphire. the following Pokemon can: grovile( treeko),kirlia(ralts)shroomish, eletrike, Roselia, plusle, munun, magnemite, voltorb and many more
HM 05 is flash
In Pokemon Platinum, Flash is a TM.
Look at "How do you get hm flash in blue?" On this site.
on Pokemon yellow on Pokemon yellow
its not an HM anymore you have to find it.
In Pokémon HeartGold, you can find the Rock Smash HM in Route 36, a fat guy will give it to you.yes. but flash in no longer an HM
You can get the Hm flash of Pokemon silver is from the elder on the top of sprout tower in Violet city. There are alot of trainers through out sprout tower
you get the HM Flash after beating the electric gym leader, if i recall correctly
Flash, I believe.
flash isn't a HM but a TM and you can purchase it at goldenrod city super store thing