The unused tune from Red/Blue exists in Yellow too
I found this completely by accident while playing around with the 'ws m' (hex: 63) item. I tried to make an equivalent of TheZZAZZGlitch's get any gift Pokémon code for Yellow but failed and my items changed. I used the item again and it happened to play part of the unused tune for one channel.
Save file download:
https://mega.co.nz/#!FxtihBLJ!HmQUiEA4VjnvehOZFKqNfUYumekhlr5XzUt1DxxReVA
Works on Yellow only. Just use ws m but don't change the third+ items/change the Pokémon in the current box. Also it only seems to work in Pallet Town.
Manual setup:
TheZZAZZGlitch's Bootstrapping code (http://forums.glitchcity.info/index.php/topic,6638.msg189586.html#msg189586)
Anywhere not specified: w sm (hex: 63)
Item 3: Glitch item 93h x140
Item 4: TM48 x247
Item 5: Ultra Ball x64
Item 6: TM05 x125
Item 7: Bike Voucher x201
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Currently, Evie (ChickasaurusGL) 🌺 has 1,628,878 views for Pokémon Red and Blue across 241 videos. There's over 1 day worth of watchable video for Pokémon Red and Blue published on his channel, or 21.83% of the total watchable video on Evie (ChickasaurusGL) 🌺's YouTube channel.