By gen 9, Masuda goes totally insane and the pokemon stats are simplified, now there are only 3 stats, these are:


Health:
Calculated as: HP+Defense+Special defense divided by 3

Offense:
Calculated as: Attack+Special attack divided by 2 (Physical and special split completely removed, since attack and defense are now a single stat)

Speed
Stays the same.

Example: Zacian's new stats would be:

Health: 107
Attack: 125
Speed:148