In Pokémon Mystery Dungeon: Blue Rescue Team, the HM Flash is used to illuminate dark areas in dungeons, making it easier to navigate through them. When used, it temporarily brightens the surroundings, allowing players to see the layout and any hidden items or enemies. However, it does not affect Pokémon encounters or battles within the dark areas.
Cuts.
You can get it with a key the unlock a chamber
you get HM surf
solar cave
Look at "How do you get hm flash in blue?" On this site.
If you think so, your a dumb, stupid, nooby, idiot. Of course not.
To get the hm dive you have to beat raquaza and and see the credits then you go to wiscash pond and wiscash will give it to you.
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From Wish cast after you defeat groudon in the magma cavern. Hope it helped:)
You can get the Waterfall HM in Solar Cave (with key on any floor or without key on 20F, Look for a place with water in a square).
In the solar cave behind a locked door that you have to unlock with a key
you can get HM fly in wyvern hill on 30f