Jyxobot is a crawler for Jyxo.cz a Czech search engine. It comes from
195.113.214.204 and
195.113.214.205 IP addresses. The full user string is "Jyxobot/1". This bot does request robots.txt, however I am not sure whether Jyxobot can be blocked via robots.txt.
It seems that Jyxo.cz indexes only Czech content, so if you do not have Czech content then Jyxobot is useless for you.