I recently found something shocking (for me mostly ). Pikachu is not a mouse... It is a pika. Yes, there is an animal called pika. It is just a small rodent, like a mouse. Proof: http://en.wikipedia.org/wiki/Pika
My question is: Why is pikachu called the mouse pokemon, not the pika pokemon?
1. The similarity of the names?
2. The fact pikas aren't world renowned?
What do you think?