Go to lavender town go to the right and there it is.
at the top of the tower your find him
Whirlpool isn't in Pokemon Yellow Version.
You get the flute in the Pokemon tower after you get the silph scope.
It depends which version you are playing. Red/Blue version: You can find Koffing in the Pokemon Mansion, however he is rare in Blue version. Yellow Version: He cannot be found in Yellow. Gold/Crystal/Silver version: You can find him in Mahogany Town or the Burned Tower. Ruby/Sapphire/Emerald version: You can find him on the Fiery Path, however he is rare in Sapphire version. FireRed/LeafGreen version: You can find him in the Pokemon Mansion, however he is rare in LeafGreen. Colosseum: He cannot be found in Colosseum. XD: He cannot be found in XD.
The tower
Cinnabar mansion
In Pokemon Yellow you have to find the silph scope, and then go the the tower and it is the unidentified ghost!
the flute is given by Mr Fuji after you defeat Marowak in the Pokemon Tower or the graveyard.
go to torrent
You will find it naturally on the upper floors of Celestial Tower (the memorial tower on route 7) on both Pokemon Black and Pokemon White.
you cant get the red yellow and blue cards anymore
Growlithe are specific to red version and yellow version only. As are oddish