Route 21 Pokémon Yellow · Route

Wild Pokémon

Tall grass encounter rate 25/255 per step

Pokémon	Type	Lv.	Chance
Pidgey	NormalFlying	11–17	54.7%
Rattata	Normal	13–15	29.7%
Pidgeotto	NormalFlying	15–19	10.5%
Raticate	Normal	15	5.1%

Surfing encounter rate 5/255

Pokémon	Type	Lv.	Chance
Tentacool	WaterPoison	5–40	100%

Fishing

Rod	Pokémon	Lv.	Chance
Old Rod	Magikarp	5	100%
Good Rod	Goldeen	10	50%
	Poliwag	10	50%
Super Rod	Tentacool	15–30	59.8%
	Staryu	20	29.7%
	Tentacruel	30	10.5%

Grass, cave and surfing chances are the Generation I encounter slots (10 slots weighted 51, 51, 39, 25, 25, 25, 13, 13, 11 and 3 out of 256); the Super Rod picks from four slots weighted 102, 76, 51 and 27, the Good Rod is 50/50 and the Old Rod always hooks a level 5 Magikarp. Where to find every Pokémon.

Trainers

Trainer	Pokémon	Prize
Fisherman	Seaking 28Goldeen 28Seaking 28Seaking 28	₽980
Fisherman	Magikarp 27Magikarp 27Magikarp 27Magikarp 27Magikarp 27Magikarp 27	₽945
Swimmer	Seadra 33Tentacruel 33	₽165
Cue Ball	Tentacool 31Tentacool 31Tentacruel 31	₽775
Swimmer	Starmie 37	₽185
Swimmer	Staryu 33Wartortle 33	₽165
Swimmer	Poliwhirl 32Tentacool 32Seadra 32	₽160
Fisherman	Shellder 31Cloyster 31	₽1,085
Fisherman	Seaking 33Goldeen 33	₽1,155

Prize money is the trainer class’s base amount times the level of their last Pokémon.

Items

No items to pick up here.

Tips

• Pidgey, Rattata and Pidgeotto live in the grass patches, if you want a quick catch.
• Wild encounters while surfing are only Tentacool.
• The Super Rod can bring up Staryu and Tentacruel.
• The trainers are strong Water types, including Starmie at level 37.
• Fly is faster than Surfing if you only want to go from Pallet Town to Cinnabar.