"Cardboard War-Machines"), or simply LBX, is a series of action role-playing video games created by Level-5, involving small plastic model robots known as LBXs (standing for "Little Battler eXperience") that fight on dioramas made out of cardboard, with the main character setting out to battle against LBXs created by other characters.

Four years after the creation of these fortified cardboard, in AD 2050, Van Yamano, a male middle school student, was entrusted with the LBX "AX-00" by a mysterious woman, containing a Platinum Capsule.

LBX, which stands for "Little Battlers eXperience", are a line of commercially released robot models and was the primary focus of the series.

Originally made in the 2040s by Tiny Orbit, the largest toy maker in the world, LBXs were initially discontinued for being deemed too dangerous and powerful to be used for entertainment purposes as a result of their unchecked destructive capabilities.

[2] The first series, based on the first game, is produced by Oriental Light and Magic under the direction of Naohito Takahashi and began airing on TV Tokyo from March 2, 2011, to January 11, 2012, with a total of 44 Episodes.

An adaptation of the sequel series, Little Battlers eXperience W, aired as the second season of LBX, premiering October 18, 2015 on Nicktoons.

[10][11] Funimation licensed the series and streamed it on its website in North America and the British Isles, in Europe through Wakanim, and in Australia and New Zealand through AnimeLab.

[13] A movie adaptation was announced in the July issue of CoroCoro Comic titled Inazuma Eleven GO vs. Danbōru Senki W, which premiered in theaters on December 1, 2012.

Another manga adaptation, entitled Danball Senki Kaidō Jin Gaiden (ダンボール戦機 海道ジン外伝), was written and illustrated by Hiroyuki Takei under the pen name Hiro was published in CoroCoro G.[16] There is also a manga adaptation of Danball Senki Wars which is also serialized in CoroCoro Comic.

The background music for the English version was composed by David Iris, John Mitchell and Tom Keenlyside.

The second ending song is "Bokutachi no Wars" performed by Ryota Ohsaka, Sayori Ishizuka, and Tomoaki Maeno.