It's a concept based on lore from the franchise. 

The Clefairy line are canonically rumored to be alien in origin. 

Pokedex entries about Staryu read that they're made of stardust.. 

This is Deoxys' pokedex entry: "A POKéMON that mutated from an extraterrestrial virus exposed to a laser beam. Its body is configured for superior agility and speed."

In Unova, there's a location based on Area 51 - this is Elgyem's pokedex entry from Black2/White2: [b]"Rumors of its origin are linked to a UFO crash site in the desert 50 years ago."[/b]

There's an entire wiki page dedicated to extra-terrestrial pokemon [url=https://bulbapedia.bulbagarden.net/wiki/Extraterrestrial_Pok%C3%A9mon]here[/url].


Why do you think the staff would care about a strange kid with a small radio hobby? Why would they be thinking about a minor news story from a decade ago? 

Nothing about the character is random. His name, Ufo Tofu is a palindrome. Radio is a popular medium in Kanto. The Lavender and Goldenrod Radio Towers are significant landmarks. Professor Oak hosts a radio show called [url=https://bulbapedia.bulbagarden.net/wiki/Radio#Professor_Oak.27s_Pok.C3.A9mon_Talk]Professor Oak's Pokemon Talk[/url]. Cedar is the name of a tree that rhymes with radar, bit of a stretch but it was the best I could come up with.

The point of Tofu was to learn that children exaggerate things and UFOs may not be real but certain Pokemon definitely do originate from space. His thesis would have developed alongside his character developing. 

Anyway, I think it's a pity to block SETI in a roleplay based on science but it was your call!