Myrkur
Fisherman
Thanks guys for the advice, I tried a ton of times making them sleep, paralyzing ecc... even leaving with red HP... I'll have my Koffing trained...too much work and poké/greatballs for a mass of stone that spits poison! 
Maybe it's only my Pokédex, it contains also infos of unavailable poké like some in DragonDen or Route 42 where we can't go right now...or can we? Was I left behind?
Thanks Darkfire, you're a sort of guardian angel ^^The pokedex habitat mode is 100% accurate.
It is based directly off the wild pokemon files
If the pokemo is listed there it is catchable in one of 4 ways:walking, headbutt, surf, or rocksmash
Maybe it's only my Pokédex, it contains also infos of unavailable poké like some in DragonDen or Route 42 where we can't go right now...or can we? Was I left behind?