For starters my name is Eri Mizutani... it's better than just calling me random names?

As for tips, using the sounds they make is a good start. Like for a Pikachu. pokadot would be good good name. Since they make a pika noise and it sounds a little like the root of pokadot? For a Persian, purcat would work since it's a pun on cats purring and the word perfect...