MADRID — Spanish mini-studio Filmax Ent. and top Argentine production house Patagonik are closing a co-development deal to produce a TV series spinoff of animated feature “The Hairy Tooth Fairy,” the highest scoring Spanish pic at the B.O. this year.

Unlike the feature, which employed a mix of live action and 3D, “The Hairy Tooth Fairy: the Series” will be 100% 3D, said Filmax Animation CEO Francisco Rodriguez. Patagonik and Filmax, co-owners of the property, are thrashing out concepts for the skein, playing off the feature in which a small girl sets out to free a kidnapped sugartooth fairy, a mouse called Ratoncito Perez.

Patagonik and Filmax aim to bring in partners from France and Italy, which also have traditions of a mouse version of the sugar-tooth fairy.

A sequel feature is in production, directed by Andres Schaer, which will be ready for delivery in 2008.

The series would be completed in 2009/10. “We have a brand. We have to keep it alive,” Rodriguez explained.

“Fairy,” the series, will be presented at the Cartoon Forum in Gerona, Catalonia, this September.

Co-produced by Filmax and Patagonik, toon pic “Fairy” bowed Nov. 10 in Spain and finished with a cume of Euros 3.6 million ($4.9 million), making it the highest-grossing Spanish toon pic ever.

“Fairy” was also one of only two Argentine pics to have a significant B.O. impact in Argentina, where it grossed $2.4 million.