Pokémon Red and Blue/Route 3

New Pokémon Available

Red	Blue	Yellow
Jigglypuff Purchase in Pokémon Center: Magikarp		Sandshrew Purchase in Pokémon Center: Magikarp

After you receive the Boulder Badge, other Pokémon trainers will see you as a worthy opponent. No fewer than eight trainers wait to challenge you along Route #3. You'll have a tough struggle getting through them all, but you'll emerge from Route #3 a more powerful (and richer) trainer than ever. Stock up on Poké Balls to capture some more Pokémon in the wild too.

File:Pokemon RBY Route03.png

Route #3

1	Lass	135
	Pidgey	LV9
	Pidgey	LV9
2	Bug Catcher	100
	Caterpie	LV10
	Weedle	LV10
	Caterpie	LV10
3	Youngster	165
	Rattata	LV11
	Ekans	LV11
4	Bug Catcher	90
	Weedle	LV9
	Kakuna	LV9
	Caterpie	LV9
	Metapod	LV9
5	Lass	150
	Rattata	LV10
	Nidoran♂	LV10
6	Youngster	210
	Spearow	LV14
7	Bug Catcher	110
	Caterpie	LV11
	Metapod	LV11
8	Lass	210
	Jigglypuff	LV14

Route 3 encounters

Pidgey	50%	50%	N/A
Spearow	40%	40%	55%
Jigglypuff	10%	10%	N/A
Rattata	N/A	N/A	15%
Sandshrew	N/A	N/A	15%
Mankey	N/A	N/A	15%

On the way to Mt. Moon

There are eight Pokémon trainers between Pewter City and the entrance to Mt. Moon, but they're pretty easy to avoid. Still, you may need the EXP: Mt. Moon is tough.but if you have a ginoly you will kick ass with bite growl lick and water gun

At the Mt. Moon Pokémon Center, you can pick up a black market Magikarp for 500. As for wild Pokémon, Jigglypuff in Red and Blue are decent, but Yellow players shouldn't move on without a Sandshrew.

#39 Jigglypuff	#27 Sandshrew
Jigglypuff, even more ridiculously cute in Yellow, have a ton of HP, but are mediocre in all their other stats. Their Sing attack is annoying to be put to sleep by, but is nearly a coin-flip in accuracy. Pound works well enough early on, but Jigglypuff will be starved for good attacks until it learns Body Slam at level 34. Jigglypuff can use a wide variety of powerful TMs, but it probably isn't worthy of these precious TMs, as the result isn't spectacular. Jigglypuff can evolve right away with a Moon Stone, found in Mt. Moon, but this will keep it from learning moves through leveling up.	This Ground-type Pokémon doesn't learn anything particularly exciting on its own (Although it does get the powerful Slash attack at a fairly low level), but it has good Attack and Defense (especially in its final form), although it doesn't have much Special or Speed. The lack of a Rock-type means that it can potentially survive a medium power Grass- or Water-type attack if it must take one. While it must use a TM to give it a Ground attack (Like Dig, which you'll get at the next town), Sandshrew is a great Pokémon that is pretty useful throughout the game.
#129 Magikarp
The thing about Magikarp is that they're completely horrible. They come with only one move, Splash, and it does literally nothing. Magikarp can't learn any TMs or HMs and they don't even learn a real attack until level 15! BUT if you can get one to level 20, it will evolve into Gyarados, a Water/Flying-type with great stats and a small but useful move pool that includes the powerful Hydro Pump (and several more great moves by TM.) If you want, you can buy it to begin leveling it up now. However, this will devour many experience points that would have (and should have) gone to other Pokémon at this early stage. You can fish for a Magikarp anywhere some other time once you get the Old Rod, and it's probably a good idea to do so.