catch ten or more pokemon. find oaks aid near viridian city and talk to him. he will look at your pokedex and if you have ten or more pokemon, he will give you flas. hope this is helpful!
on Pokemon yellow on Pokemon yellow
Flash can be found on Route 2 in Pokemon Yellow Version.
pikachu or electric Pokemon ......
Cut, Fly, Surf, Strength, Flash.
To navigate through Rock Tunnel
YELLOW FLASH is defenitly faster
Pikachu can. Any grass or electric Pokemon may learn it.
Teach it to a Pokemon, then select the Pokemon you taught it to in the party and select Flash.
the fouth hokage is the yellow flash
To my knowledge i don't think there is a waterfall in Pokemon yellow and it is quite irrelevant to the storline if there was one. If you mean a HM named waterfall...i think your on the wrong game, only pearl and diamond have waterfall HM...i think. There are only 5 HM's in Pokemon Yellow Flash, Cut, Fly, Surf, Strength.
Because Minato's name means 'Yellow Flash' in Japanese.
In Pokemon Platinum, Flash is a TM.