Question

Can you increase the chances of a pokemon appearing in a Route in emerald?

Answer 1

Yes, you can!! Ability "Swarm" Doubles the chances, but it only works if the pokemon with the ability is the first one in your party... http://pokemondb.net/ability/swarm

Hope this helps...

Answer 2

Here is a list of some of them that double wild pokemon....
Swarm

Arena Trap

Illuminate

No Guard

This are a few that i found.....
Hope this Helped.

Comments

ok i know that this a year old question but still....

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It's completely alright!
As long as you're able to provide more information, and you did!
Nice answer! :)