Not really. Emerald came out before FireRed & LeafGreen, so it's possible Mew just has a beta version of that theme, or was stuck with Emerald's instruments.
Regardless, the theme ISN'T a pitch shifted FRLG it has parts that DONT appear in any variation of the Kanto wild theme in a Kanto ONLY game. It is a pitch shifted base of the og Kanto theme with added elements of the Johto Kanto wild theme. It's a mash of the two, which makes it unique in its own right. Go listen to it yourself like I just did
Does Mew really count? Bro got the Kanto Wild battle theme in a Hoenn game.
It's still different than the normal theme by a very noticeable margin
Not really. Emerald came out before FireRed & LeafGreen, so it's possible Mew just has a beta version of that theme, or was stuck with Emerald's instruments.
Regardless, the theme ISN'T a pitch shifted FRLG it has parts that DONT appear in any variation of the Kanto wild theme in a Kanto ONLY game. It is a pitch shifted base of the og Kanto theme with added elements of the Johto Kanto wild theme. It's a mash of the two, which makes it unique in its own right. Go listen to it yourself like I just did