The Bandersnatch was a Tyrant - B.O.W. model type developed by the Umbrella Corporation in 1998. The name originates from Lewis Carroll's poems The Hunting of the Snark and Jabberwocky, which give no description of the creature.
The Bandersnatch was developed as an offshoot of the Tyrant project, intended for reasons of practicality.[excerpt 1] The reason for this was simple - those with the necessary genes to be turned into Tyrants were small in number, and the Tyrants themselves were expensive to develop. In short, the Bandersnatch was a 'cost-effective' alternative proposal. Due to the flawed/cost-effective processes used in their creation, parts of their anatomy tended to atrophy away within moments of their creation; the atrophied parts were often their left arms.
Albert Wesker, who led the attack, obtained the Bandersnatch research data for further experimentation. The Jabberwock S3 was the product of this research. One Bandersnatch was inadvertently released by Wesker when he threw Chris Redfield away in order to confront Alexia Ashford when she popped up on the screen, as Chris impacted its containment field and damaged it.
↑Excerpt from CODE: Veronica webpage: Tairanto o bēsu to shi, tantai de no heiki to shite no kansei-do yori jitsuyō-sei o jūshi shite tsukura reta ryōsan-gata no shisaku-tai. Hito ni Gyō Sō suru kēsu ga sōtei sa rete orazu, minikui gaikan o rotei shite iru. Kahanshin ga taika shite iru tame hokō nōryoku ni nan ga aru. Hidariude mo ketsujo shite iruga, gyaku ni hattatsu shita shinshuku jizai no migiude ga, sorera no ketten o oginatte iru. (タイラントをベースとし、単体での兵器としての完成度より実用性を重視して作られた量産型の試作体。人に凝装するケースが想定されておらず、みにくい外観を露呈している。下半身が退化しているため歩行能力に難がある。左腕も欠如しているが、逆に発達した伸縮自在の右腕が、それらの欠点をおぎなっている。?)