>>51879682whiscash has the ability oblivious and learns amnesia, as well as having the ability to naturally cause earthquakes; it's very likely it undergoes some sort of trance-like state when causing an earthquake that causes it to lose its memory. of course, whiscash is also a water type, so all it has to do is look at it's reflection in the water and it'll see the W and think to itself "oh shit, that's right, I'm Whiscash". very intuitive design honestly.