Here is a possible chain:
- Breed a female Totodile with a male Corsola that knows Ancientpower until you get a baby male Totodile.
- Breed the male Totodile that knows Ancientpower with a female Larvitar until you get a baby male Larvitar that knows Ancientpower.
- Finally, level up the Larvitar that knows Ancientpower to Level 43 (Level 47 if you decide to evolve it into Pupitar) which is when it learns Crunch. Then, use this as a parent and breed it with a female Totodile that you used earlier. You should have a baby Totodile with Ancientpower and Crunch.