You get the fossil from Mt.moon but you need to go to cinnibar island and revive the fossil(Helix).

Omanyte #138

Omanyte

FOUND:RED & BLUE
CAUGHT:RED & BLUE

FOUND:Mt.Moon

LEVEL ATTACK TYPE

-

 Water Gun WATR

-

 Withdraw WATR

34

 Horn Attack NRM

39

 Leer NRM

44

 Spike Cannon NRM

49

 Hydro Pump WATR
CAPABLE WITH
TM:06,08,09,10,11,12,13,14,20,31,32,33,
34,40,44,50
HM:03

TYPE:ROCK & WATER

OMANYTE------LEV.40------>OMASTAR