Here's some of my favorites that I've nabbed off Tumblr. There is a series of thirty versions. They are made by the artist Benjamin Dewey. The artist's Twitter.

Fantastic Funny Pacific Rim Valentines

Fantastic Funny Pacific Rim Valentines

Fantastic Funny Pacific Rim Valentines

Fantastic Funny Pacific Rim Valentines

Fantastic Funny Pacific Rim Valentines

Fantastic Funny Pacific Rim Valentines