>>51154592It's made very clear in Japanese marketing, which heavily uses the word zenryoku when describing Z-Moves. The "zenith" thing is something TPCi came up with later since they didn't originally realize the Z stood for something, so it just got like a single offhand mention in USUM or something.
It's the same as with Ganbaririe, which has like three different official translations into English because TPCi didn't realize it was a term when they first translated SM.
