Most of the electric,grass and psychic type can learn flash
In the Pokemon video games, Shroomish is able to learn Flash via the HM05. Flash is the only HM move which can be taught to Shroomish.
Hm 01-cut hm 02-fly hm 03-surf hm 04-strength hm 05-flash hm 06-rock smash hm 07-waterfall hm 08-dive
cut, (if you've memorized everything and/or aren't lazy you don't need flash), surf, (fly is useful), rock smash, strength, and I think there's one more. but you don't really need fly or flash; you do need the others. hm 1 cut hm 2 fly hm 3 surf hm 4 strength hm 5 flash hm 6 rock smash hm 7 waterfall
There are 9 HMs HM:01 Cut HM:02 Fly HM:03 Surf HM:04 Strength HM:05 Flash HM:06 Whirlpool HM:07 Waterfall HM:08 Rock Smash HM:09 Rock Climb
Ho-Oh can learn sacred fire,fire blast,thunder{which you need a TM},weather ball,flash[also needs a TM],fly{needs the HM}sky power, etc
In the Pokemon video games, Shroomish is able to learn Flash via the HM05. Flash is the only HM move which can be taught to Shroomish.
Raichu can learn Flash either by the HM in earlier games or the TM in later games. Either way it can learn Flash at anytime.
flash isn't a HM it is a TM
Surf, Strength, Waterfall, Rock Smash, Dive, Flash.
it should tell you when your teaching a Pokemon a TM/hm!
machop is a good hm slave. he can learn rock smash, rock climb, strengh,. in Pokemon emerald nincada is a good hm slave but in Pokemon pearl flash is not an hm. any water type can learn waterfal or surf espacially palkia.
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.
Of the seven pokemon available in Granite Cave, the cave northwest of Dewford Town, only Abra and Sableye can learn HM05 Flash.
Look at "How do you get hm flash in blue?" On this site.
hm 05 you sped
You get Hm flash from the hiker in granite cave in dewford.BEWARE!You can only use flash if you get the knuckle badge from Brawly
HM 05 is flash