( Season 1 )
Marblegens are magnetic marbles used in the sport of the same name. Cosmo, Aissa, Luna and Sam decide to put together a team to participate in the Olympia tournament, the prize being the Mercure, a marble with unlimited powers. Their aim: prevent the mysterious Marcellus King seizing the precious trophy.

Directed by: Daniel Dubuis, Olivier Jongerlynck (France, 2018)