Is KH V Cast a canon game.?..because it picked up my interest...

No. Not at all. It's just a little phone thingy that practically no one plays.

Yeah, it's not in any way canon to the series.

But it has a story? right?

not really its like a dream that sora has before they go to Hollow Bation in Kingdom Hearts its not that important and there is no story really its kinda like when your at Destiny Islands where you have to find things for the raft thats basicly what you do in this one find things to get off an island that you "landed" on

Yeah, Kingdom Hearts V Cast is pretty much just a lame game that has little to no relation to the actual canon series. It was made just by Disney with no collaboration with Square Enix, so it's not that much of a big deal. But I guess if you have the V Cast phone and the game's a decent price, then you could pick it up. If not, you're not missing out on anything. Literally, NOTHING!

wtf is kh v

No, it's not important. It's practically trash(I can't believe I said that about a KH game).If it was important, I think everyone would have been mentioning it if it was like every KH game that's been out.

It has nothing to do with the main series at all, since it was developed by Disney themselves without any cooperation from SE, just to make money. I'd personally like to forget it ever existed.