|Ganesh rides on a mouse.|
No, not that kind of mouse.
Ganesh is not clumsy, but is not delicate, either. In the end, what is the difference between a lack of delicacy and lack of skill? Intention, care, effort. Ganesh breaks down all obstacles in his way without a care, and needed just such a vehicle as Kroncha: Kroncha's intention, care and effort helps Ganesh’s indelicacy at least not cause harm.
When Ganesh met Kroncha (now a mouse), it was because Kroncha accidentally bumped into Ganesh and stepped on his toes. Ganesh understood the potential for Kroncha immediately, and Kroncha saw his ability to be useful. The two hit it off and became good friends, despite their total lack of social charm, mutually insulting each other and bruising each other. It was only natural Ganesh would take out his lasso and throw it around Kroncha’s neck to leap on – and has ridden Kroncha as a vehicle ever since (Kroncha has carried Ganesh ever since).