The movie was shot in 20 days over a period of more than 2 years.
90% of the VFX were made by the art director and VFX supervisor Vianney Griffon.
The fight scene on its own was as complicated to make for all the people involved (director, VFX supervisor, composer...) as the rest of the movie.
The actor who play Baby Trunks is the real life nephew of Benjamin Hubert, who plays adult Trunks.
Cell is portrayed by three actors : Michel Durand played his face, Jonathan Henry his body and Romain Lapierre wore the real prosthetic arm during the fight.