Similar names and identical names happen all the time as well. For example, in Kathryn Lasky's book series Wolves of the Beyond, the bear and owl heavens were named Ursaluna and Glaumora, and later on Pokemon made Pokemon named Ursaluna and Glimmora. And also, I haven't heard of a single Pal with a name that was similar to any Pokemon's. And if any were similar in the slightest, it would most likely be due to name origins coming from the same Latin, greek, etc root.