You can't find one you need to train slowpoke to level 36.
Of course Slowbro can find in leaf green. He is in the
dungeon where you can find Mewtwo.
There are still atleast two other locations where he can be found.
Chat with our AI personalities
In Pokemon leafgreen, slowpoke either evolves into slowbro at Lv.37 or slowking, when you give it the item King's Rock to hold and then trade it.
level 37Evolves into a Slowbro at lvl.37Level 37.
pshycic,surf,confuse ray,and body slam
Piplup does not exist in Pokemon LeafGreen or FireRed.
you go to the seafoam islands and go inside and look around for a slowbro or slowpoke you will find one eventually