Suggestions by @VitorFleith

Ralph Breaks the Internet

as Gorgo (1961) in myCast-o-Meter (Kaiju films and series)

B*tch I’m Madonna

as The Giant Gila Monster (1959) in myCast-o-Meter (Kaiju films and series)

2000 man (Kiss)

as The Giant Gila Monster (1959) in myCast-o-Meter (Kaiju films and series)

Iron Maiden

as The Giant Gila Monster (1959) in myCast-o-Meter (Kaiju films and series)

Lady Gaga

as The Giant Gila Monster (1959) in myCast-o-Meter (Kaiju films and series)

Michael Jackson

as The Giant Gila Monster (1959) in myCast-o-Meter (Kaiju films and series)

Ozzy Osbourne

as The Giant Gila Monster (1959) in myCast-o-Meter (Kaiju films and series)

50 Cent

as The Giant Gila Monster (1959) in myCast-o-Meter (Kaiju films and series)

Eminem

as The Giant Gila Monster (1959) in myCast-o-Meter (Kaiju films and series)

Tauz

as The Giant Gila Monster (1959) in myCast-o-Meter (Kaiju films and series)

Weird Science

as Mothra (1961) in myCast-o-Meter (Kaiju films and series)

Felipe Castanhari

as Mothra (1961) in myCast-o-Meter (Kaiju films and series)

Max Headroom

as Mothra (1961) in myCast-o-Meter (Kaiju films and series)

P Diddy

as Mothra (1961) in myCast-o-Meter (Kaiju films and series)

Pablo Escobar

as Mothra (1961) in myCast-o-Meter (Kaiju films and series)

Willy Wonka (Johnny Depp)

as Mothra (1961) in myCast-o-Meter (Kaiju films and series)

Patrick Bateman

as Mothra (1961) in myCast-o-Meter (Kaiju films and series)

Pecker (movie)

as The Giant Behemoth (1959) in myCast-o-Meter (Kaiju films and series)

Ronald McDonald

as The Giant Behemoth (1959) in myCast-o-Meter (Kaiju films and series)

Duracell Bunny

as The Giant Behemoth (1959) in myCast-o-Meter (Kaiju films and series)