Tencent has just announced that Timi Studio Group which is their game studio, responsible for many big name titles, will team up with The Pokémon Company to develop a new Pokémon game on smartphone.
There is no detail or the game overview shared by Tencent just yet, but the statement can be found below:

We will keep up when there is further information, stay tuned!
Source: NintendoEverything