Possible early Monotype challenges in each game?

Question

Like in Ruby, Sapphire, Emerald, Omega Ruby and Alpha Sapphire:
Dark Monotype:
Catch Poochyena in Route 101
Psychic Monotype:
Catch Ralts in Route 102

Comments

What exactly does "early" mean? If you can catch a Plusle on Route 110, does that count as early? If you can catch a Nincada and raise it to level 20 to get Shedinja, does that count as early?

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The first Pokémons that you can get in the first routes.

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Does Route 110 count as one of the first routes?

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No, it needs to be Route 101-103.

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If you count petelburgh woods, tell me I'll edit.

Answer 1

Possible monotype challenges:
Normal : zigzagoon available in route 101 at earliest
Flying : wingull available in route 102 at earliest
Grass : seedot and lotad available in route 102, if you don't count starters
Water : lotad and surskit available in route 102, if you don't count starters
Bug: wrumple and surskit in route 102
As you said:

Dark Monotype:
Catch Poochyena in Route 101
Psychic Monotype:
Catch Ralts in Route 102

These 2 too.
Hope I helped!
(Note: no surskit if not playing OrAs)

Source: this, this and this.