Yanma not evolve at a certain level, you must teach him the move Ancient Power. Then, once you level him up, he should evolve.
it will evolve at level 21
It will evolve at level 48
Arbok does not evolve
Pachirisu does not evolve :(
level them up
At level 10.
level 44
level 26
level 26
Level 24
Level 48.
Level 30