Speaking of Olivine City, What about the Whirlpools between Cianwood city and Olivine City. Whirlpool has been stopped as a HM since Ruby version.
Yea, since the 3rd Gen of Pkmn games, whirlpool has became useless. It's still available as a HM for FR/LG(I think) but since there aren't any whirpools in any 3rd Gen game, its just an ordinary move with no other use. You could remove the whirlpools from the Whirl Islands(or whatever they're called) but then that would take out the Whirl from Whirl Islands(not that it really matters, Im sure most people just wanna get Lugia whatever way possible)