That depends. In the Sinnoh Pokedex, #80 is Barboach. In the National Pokedex, #80 is Slowbro.
diamond pokedex number 80 is Barboach
Barboach and it's in mt.coronet
In Pokemon Diamond, if you have the sinnoh pokedex(that means you have not found all the Pokemon in the sinnoh region)number 80 is barboach. If you have the national pokedex, number 80 is slowbro. I hope that helps.
Barbroach is number 80
#80, Sinnoh Dex: Barboach, found while fishing
Slowbro
barboach
barboach
Slowbro is #80 in the national pokedex, and it is a Water-Psychic type Pokemon.
Pokemon number 80 is: Barboach. It can be found on route 208 by fishing and using the good rod.
Pokemon #80 in Sinnoh pokedex is Barboach.
Barboach. You can get it in the Safari Zone/ Great Marsh.