Creepis Kryp
It is not just a retro dance style, but it has some of the corniest moves like batman's bat-tusey mixed in there. Shows how the two characters are willing to look silly together, something her main man would never do. A definite bond formed between them there.

emjob
There isn't really some hidden meaning as to why it was so memorable. It was just a fun dance in a cool movie set to a good song choice!