He's another member of the DFF (Downunda Freedom Fighters) and he met Walt while he was meditating on something, and then POW! Walt accidentally hopped on him without knowing he was there. Guru then said that it must have been fate for them to meet, and so they moved through the area they were in, until they found Duck Bill Platypus, and helped him smash up some Swatbots, and ect. Guru doesn't like to fight, so he'll find another way to help, but when fate calls it's hand, Guru will leave his pacifist ways and put an end to whatever he must end.