Here is "Dog's Theme Box - Nintendogs":
ECGECGF-
G---zzzz
Last G is high, all other G's and other notes are low.
Here is "Calamari Inkantation - Splatoon":
D--CD--C
D--CDCAC
All the high notes or all the low notes will work.
Here is "Maplestory Theme Music - Intro":
CACF-G-A
---zzzzz
G and the second A are high, C and the first A are low.
Here is "Friends Theme song with lyrics":
G-FE-CE-
D---zzzz
High G, all other notes low.
You could make them on this site
https://tunes.nooknet.net and generate a link to the tune instead of having to type the letters out
I could do that, but I choose not to. The previous town tune making site went down after a few years, and as far as I know, all town tunes made on it were lost, and links that linked to it became dead. But all of the ones that have been written out in regular text are still around for people to find years later. Plus I feel like it's more convenient to have the town tune itself directly in my replies to people's requests, rather than posting links or having to take screenshots and insert them into my posts.