Explanation: This is a list of the first note every Natural Monster plays on their first island (Or in one monster's case, the island where it first plays tonal notes). Atonal monsters aren't included (Sorry Noggin Drumpler Shrubb Pango Congle Pummel Clamble T-rox Scups and Shellbeat)

Mammott: C (Plant)

Toe Jammer: G (Plant) (Also uh is this one a chord? I can't tell if it's a chord or one note)

Potbelly: G (Plant)

Tweedle: F major chord (Cold)

Fwog: G (Plant)

Maw: G (Plant)

Oaktopus: C (Plant)

Furcorn: C (Plant)

Quibble: G (Cold)

Dandidoo: E# (Technically F but it's notated as E#) (Cold)

Cybop: G (Air)

Bowgart: C (Plant)

Thumpies: E (Cold)

Spunge: E (Cold)

PomPom: G (Air)

Reedling: B (Water)

Entbrat: C (Plant)

Deedge: D (Gold)

Riff: D chord (Air)

Quarrister: C chord (Earth)

Mimic: D# (Continent)