Route 31

Johto · Gold

Pokémon	Type	Levels	Held	Morn4–10	Day10–18	Night18–4
Walk
Rattata	Normal	4–5	—	—	—	40%
Caterpie	Bug	4–5	—	35%	35%	—
Pidgey	NormalFlying	3	—	30%	30%	—
Spinarak	BugPoison	4	—	—	—	30%
Bellsprout	GrassPoison	3	—	20%	20%	20%
Metapod	Bug	5–6	—	15%	15%	—
Hoothoot	NormalFlying	5	—	—	—	10%
Surf
Pokémon	Type	Levels	Held	Rate
Poliwag	Water	15–24	—	90%
Poliwhirl	Water	20–24	2%	10%
Headbutt
Pokémon	Type	Levels	Held	Rate
Spearow	NormalFlying	10	—	80%
Aipom	Normal	10	—	20%
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
Spearow	NormalFlying	10	—	50%
Heracross	BugFighting	10	—	30%
Aipom	Normal	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%