JaJa Uma! Quartet
English title: Wild Cardz
Japanese title: じゃじゃ馬カルテット
Alternative titles: Crown Knights
Type: OVA
Source: Manga
Episodes: 2
Status: Finished Airing
Aired: May 21, 1997 to Sep 26, 1997
Duration: 30 min per ep
Rating: PG-13 - Teens 13 or older
Studios: Movic, Studio OX
Licensors: Central Park Media
Genres: Adventure, Comedy, Fantasy
Demographics: Shounen

The Crown Knights are a bizarre special force to fight to the criminals who threaten the tranquil Card Kingdom. Each one had a special ability. But these Crown Knights must get down and dirty when they run up against two war machines shaped like gigantic chess pieces. The deck is stacked against them, somehow they've got the checkmate these indestructible invaders before the Card Kingdom topples. 

(Source: ANN)