He underwent surgery and spent three nights in hospital.
Millet, in New Zealand on a one-year working holiday visa, was charged with the rare charge of operating a vehicle carelessly and thereby causing injury.
He appeared in the dock with the assistance of a French-speaking interpreter yesterday to plead guilty.
Police said reparation of $600 was being sought.
Judge Tony Couch said it was an interesting case, given that the significant injury was caused by a bicycle.
"It turns out even rollerblades apply as a vehicle," police prosecutor sergeant Paul Scott said.
Millet was remanded on bail until April 2 at 2.15pm for a restorative justice conference.
He made no comment as he left court.
Earlier he told NZME. News Service he did not see Mr Hewitt.