The Yoyo (Botia almorhae) gets to about 6" each and like a group - 3 of those would fill a 20g.
The Golden Zebra (Botia histronica) gets to about 5" each and like 3 or more - you could get 4 of these in the tank.
I'm not sure about "tider boties" - couldn't get any google results on them, but pretty much for a 20g, it seems you could get yoyos OR zebras but not both.
I believe he meant Tiger loaches ? If so here it is
ya I ment tiger botia I wil probly make it into a cichlid tank instead