How many Pokemon can you catch without trading in ORAS?

Question

Using the mirage spots and breeding and getting everything that exists in the Hoenn region without trading

Comments

A lot.

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So stuff like Gengar wouldn't count ?

Answer 1

All Unobtainable Pokemon
Requires trade

Politoed
Alakazam
Machamp
Golem
Slowking
Gengar
Steelix
Rhyperior
Kingdra
Scizor
Electivire
Magmortar
Porygon2
Porygon-Z
Dusknoir
Huntail
Gorebyss
Gigalith
Conkeldurr
Escavalier
Accelgor
Aromatisse
Slurpuff
Gourgeist

All other unobtainable Pokemon here

Comments

I'm not sure if you meant number-wise or Pokemon wise. I'll hide it if this isn't what you are looking for

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Just letting you know: in ORAS,  Milotic is also able to be obtained by leveling up a Feebas with max beauty.

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Include legendaries and the kanto starters, etc.