Fibonacci (i'm italian and the pronunciation of him is "feebonacci") was a matematician... He invented the famous Fibonacci sequence (0, 1, 1, 2, 3, 5, 8, 13, etc...) with the formula Fn = (Fn-1) + (Fn-2) (current number is the sum of the last two).
I think there is something with that in this npc, not only with pokemon name :Light:
Maybe a spiral pokemon? Omanyte?
https://en.wikipedia.org/wiki/Fibonacci_number