Where does “פיקאצ'ו” come from?

פיקאצ'ו (Hebrew) comes from Japanese ピカチュウ, from Japanese ピカ — sparkle.

Ancestry of “פיקאצ'ו”, step by step

Step	Language	Word	Meaning
1	Japanese	ピカチュウ	—
2	Japanese	ピカ	sparkle

פיקאצ'ו — Etymology, Origin & Word History | Etymology Explorer