Below are the details for the Treehouse route in the Pokéwalker peripheral, and a list of the wild Pokémon that may appear.

Route details

Unlock criteria 15,000 Watts (Post-National Dex)
Advantageous types Fire Ice Flying
Description A path that works with the trees of the forest. Pokémon here are always changing.

Available items

Item Steps
EnergyPowder 0
Energy Root 100
Heal Powder 500
Revival Herb 1,000
Ether 2,000
Max Ether 3,000
Max Potion 3,500
Max Elixir 4,000
Calcium 4,500
Salac Berry 8,000

Pokémon list

The Pokémon available on this route are below, with the number of steps required under normal conditions and if your Pokémon has a beneficial type.

Pokémon Lvl. Group Steps Adv. Steps
GloomGloom 14 C 0 0
WeepinbellWeepinbell 13 C 0 0
GirafarigGirafarig 28 B 1,000 750
StantlerStantler 28 B 1,000 750
CastformCastform 30 A 5,000 3,750
KecleonKecleon 30 A 5,000 3,750