Where could you get chimeco in Pokemon Emerald?

There's no Pokemon in Emerald called "Chimeco". It's likely a misspelling of a different Pokémon, or perhaps a fan-made creation.

Could you please clarify the name of the Pokemon you're asking about? Perhaps you meant:

* Chimecho: A Psychic-type Pokemon found in the Hoenn region. You can catch Chimecho in Emerald, but it's a rare encounter.

* Another Pokémon: Perhaps you're thinking of a Pokémon with a similar name.

Once you provide the correct name, I can help you find where to get it in Pokemon Emerald!