The phrase "new Pokemon" refers to recently created or discovered creatures in the Pokemon world that players can catch, train, and battle with. Full definition
A brand new Pokemon game for the 3DS recently released! (pokemondungeon.net)
Apparently, Nintendo's Junichi Masuda has tweeted a reminder about today's Nintendo Direct on Twitter, implying that some sort of new Pokemon game is likely to be shown during the event. (gamingreinvented.com)
If you buy a switch, why not buy a copy of the brand new Pokemon game as well? (gamingintel.com)