If you mean fighting type, the best you can get is Machamp. However, it is hard to get because you need someone to trade and trade back a machoke, so HItmonlee (You get it at the Fighting dojo) is the best next option. Primeape works too. Avoid Hitmonchan.
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darkrai
Venasuare
You need a silph scope to identify ghosts when you have it you can fight the Pokemon your fighting.
GYARADOS
nothing really, you can keep fighting them