>>25026488It was more than likely cancelled.
>While having a game based on Pikachu may seem like a win-win situation for the company and the players, Ishihara fears that if they don’t do a good job, it could possibly hurt the popularity of the long-loved electric rodent.They stated that if didn't turn out well, it could have a negative effect on Pikachu's popularity.
Needless to say, they probably decided that taking such a risk with their mascot wasn't worth it.