Cheat, work really hard or go to events.
Manaphy.
number 151 in the sinnoh pokedex is Manaphy. Number 151 in the national pokedex is mew.
Go to Sandgem Town and Proffesor Rowan will upgrade your pokedex if you beat the Elite Four.
in the national pokedex, it is chikorita, and in the sinnoh pokedex, it is rotom
in the sinnoh pokedex dusclops, in national pokedex aipom
Gachomp is #111 in the Sinnoh Pokedex.
number 151 in the sinnoh pokedex is Manaphy. Number 151 in the national pokedex is mew.
#151 of the Sinnoh 'dex is Manaphy, you can see it in the Pokémon Mansion, reading the book.
Manaphy
151
Number 151 is manaphy
The Sinnoh Pokedex only has 151 Pokemon in it.
There is only 151 (including Giratina) Pokemon in the Sinnoh Pokedex, therefore there isn't a 193rd Pokemon in the Sinnoh Pokedex as it does not exist.
151 sinnoh pokedex 493 national pokedex
150 hope i helped :) Actually there are 151 pokemon in the Sinnoh Pokedex but you only have to see 150 to get the National Pokedex.
look on http://www.serebii.net/pokedex-dp/001.shtml
sinnoh pokedex: manaphy, rotom national pokedex: don't have it yet
mew for national and Manaphy in the sinnoh dex