> There is a Pikachu-themed trailer towards the center of the valley that if the player tries to enter, they are stopped by one to three Pikachu exiting the trailer. There seems to be a **limitless** amount of Pikachu that come out of the trailer, and the Trial Guide near the trailer will count how many Pikachu have come out for them, although he will **eventually lose count**. Behind the trailer is a river that blocks access to the rest of the valley. In the background, more Pikachu, as well as a Slowpoke can be seen moving about. The far end of the valley is a mountain marked with caves. On top of the mountain is a small lake that flows down to the river as a waterfall.
No one knows how many pikachu are there, probably limitless. Ask GameFreak to count them. Pikach Valley is a location in the game, but we can't go there to count pikachu.
The trailer guide stop counting after 999.
So, it is unresolved.