Pokémon FireRed and LeafGreen/Route 3

At the entrance to Route 3 you will meet Prof. Oak's Aide, who will give you the Running Shoes. Now you'll be able to run fast by pressing. There is a Pokémon center at the end, so don't fret about returning to Pewter City constantly. However, make sure you're well stocked up on potions before attempting Mt. Moon.

Don't waste time looking for both forms of Nidoran on Route 3; depending on your game, you only have a 1% chance of catching the rarer form. Your best bet to get both forms is to catch two males in FireRed, or two females in LeafGreen. On Route 5, you'll be able to trade the extra one with an NPC for the other gender. Regardless of gender, both Nidoran's will later evolve into powerhouses, so catching at least one is very recommended.



Pokémon found

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Trainers

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Items

 * Oran Berry (located between ledges near Youngster Calvin).

Unlike other hidden items, hidden berries are actually visible, marked by a darkened oval on the grass, but they are hard to notice, especially until discovering how they look like for the first time. As with other hidden items, don't stand on them to pick them up. You must stand beside the berries and be facing them to be able to pick them up by pressing. Berries remain signaled on the grass after being picked up. They aren't of much use on these releases and will only stand out more at the end of the game.

Also around this area, but technically now on Route 4, there's a hidden Persim Berry, located among the rocks west of the Pokémon Center.