I had never heard of this game. I'm wondering why the name "TemTem" for a Pokemon game? It's quite curious, maybe that's what made it not so famous or something, I would suggest a rename.
The last time I played Pokemon was on Nintendo DS, I've never been that much of a fan of the saga, but it's a pretty cool game if you're someone who likes games where the goal is to complete a lot of achievements (for me, Pokemon are achievements XD). When I have more time I'll take a look at the videos to see what it's like, maybe the graphics are appealing to the eye.
It's not Pokemon. It's a different franchise inspired by Pokemon. It's pretty cool. Battles are more tactical and less based on RNG. Attacks won't miss and sleeps/paralyzes lasts for a set amount of rounds.