A screenshot just to flex.

Locations for all Ketamins:

-1 in metro

-1 on the mountain in pic

-2 in the Jump and Run section

-1 in the hole in front of the Krusty Krab

-1 behind the Krusty Krab

-5 in town

-1 inside Krusty Krab

-1 in front of Chum Bucket

-5 inside Chumbucket