Monster Rancher, known in Japan as Monster Farm (モンスターファーム, Monsutā Fāmu), is a Japanese media franchise and series of life simulation role-playing video games created by Tecmo (now Koei Tecmo).

Monsters were created by God in ancient times, following a disaster that struck the world prior to continental drift.

The breeder must raise the monster throughout its life, training it, keeping it healthy, making an exercise schedule, and trying to maximize its abilities before it dies of old age or is retired.

The characteristics of the monster (such as stats, breed and traits) are determined by various numbers stored in the game.

Certain combinations of characters will determine the monster's breed, sub-breed, stats, and traits.

This is so that players do not need to find a disc that is unique to one particular territory to get the rarest monsters.

In Monster Rancher 1 & 2 DX, a modern remaster of Monster Rancher 1 and 2, the disc system from the original games is replaced with a digital database of CDs, DVDs, music, and video games.

[2] In Ultra Kaiju Monster Rancher, an Ultraman-themed spinoff of the series, the generation system uses NFC devices (such as mobile phones, payment cards, and transit passes) alongside special codes, a keyword input menu, and the digital database from 1 & 2 DX.

A total of 73 episodes were produced over 2 series, which were split into 3 seasons for the English release, airing from 1999 to 2000.

!オルコロサーカス」, Monsutā Fāmu Faibu Sākasu Kyaraban Orijinaru Animēshon "Kessei!!