Route 31

Johto · Crystal

Pokémon	Type	Levels	Held	Morn4–10	Day10–18	Night18–4
Walk
Pidgey	NormalFlying	4–5	—	10%	40%	—
Caterpie	Bug	4	—	30%	30%	—
Ledyba	BugFlying	4	—	30%	—	—
Poliwag	Water	4	—	—	—	30%
Spinarak	BugPoison	4	—	—	—	30%
Bellsprout	GrassPoison	5	—	20%	20%	20%
Hoothoot	NormalFlying	5	—	—	—	10%
Gastly	GhostPoison	5	—	—	—	5%
Hoppip	GrassFlying	5	—	5%	5%	—
Weedle	BugPoison	4	—	5%	5%	—
Zubat	PoisonFlying	4	—	—	—	5%
Surf
Pokémon	Type	Levels	Held	Rate
Poliwag	Water	15–24	—	90%
Poliwhirl	Water	20–24	2%	10%
Headbutt
Pokémon	Type	Levels	Held	Rate
Hoothoot	NormalFlying	10	—	50%
Exeggcute	GrassPsychic	10	—	20%
Spinarak	BugPoison	10	—	15%
Ledyba	BugFlying	10	—	15%
Headbutt · rare trees
Only from a rare tree: one tree in ten, picked by the tree's position and the player's Trainer ID. Headbutting a rare tree starts a battle 80% of the time; four trees in ten start one 50% of the time, and the rest 10%.
Pokémon	Type	Levels	Held	Rate
Hoothoot	NormalFlying	10	—	50%
Pineco	Bug	10	—	30%
Exeggcute	GrassPsychic	10	—	20%
Old rod
Pokémon	Type	Levels	Held	Rate
Magikarp	Water	10	—	85%
Poliwag	Water	10	—	15%
Good rod
Pokémon	Type	Levels	Held	Rate
Poliwag	Water	20	—	65%
Magikarp	Water	20	—	35%
Super rod
Pokémon	Type	Levels	Held	Rate
Poliwag	Water	40	—	80%
Magikarp	Water	40	—	20%