>>44850508The website and trailers for USUM had a bunch of screenshots with those names. Keep in mind that the website and trailers are how we got the names Elio and Selene in the first place.
And before someone says those are "placeholder names and not official" because of the JP names clearly being placeholders or whatever, that only applies up to Gen 6. For Gen 7 onwards, the JP material started giving real names too, which is how we got Chase, Elaine, and Trace, as well as Victor and Gloria.