Old Gateau

The Old Gateau (Japanese: もりのヨウカン Forest Yōkan) is a type of medicine introduced in Generation IV. It is a local specialty of the Old Chateau and cures a Pokémon from all non-volatile status conditions and confusion.

In the core series games

Games	Cost	Sell price
DP Pt HGSS BW B2W2 XY ORAS	N/A	$100
SM USUM SwSh	N/A	$175

In the Generation V games, the Old Gateau can be sold to the gourmet maniac on Route 5 for $4000.

When used from the Bag on a Pokémon, it cures a Pokémon of all non-volatile status conditions (poison, paralysis, sleep, burn, freeze) and confusion.

Games	Description
DP Pt HGSS BW B2W2	Old Chateau's hidden specialty. It heals all the status problems of a single Pokémon.
XY ORAS SM USUM SwSh	The Old Chateau's hidden specialty. It can be used once to heal all the status conditions of a Pokémon.

Games	Finite methods	Repeatable methods
DP Pt	Old Chateau
HGSS		Trade
PW		Scary Cave, Sightseeing
BW	Dragonspiral Tower	Royal Unova ^Th
B2W2	Dragonspiral Tower	Pokéstar Studios (gift after completing a movie), Royal Unova ^Th, Join Avenue (Market), Nimbasa City (held by certain Pokémon traded from Curtis/Yancy)
DW		Spooky Manor
XY		Trade
ORAS	Trick House	Any Contest Spectacular Hall (random gift from a fan after completing a Contest)
SM USUM		Pokémon Center Café ^Th Festival Plaza (General Store)
SwSh		Battle Café

Old Gateau in the anime

Old Gateau was first seen in Get Your Rotom Running!, where Ash and his friends went to the Old Chateau to try some of the famous treat at the recommendation of Professor Oak.

A piece of Old Gateau also appeared in Getting a Jump on the Competition!.

Old Gateau in Pokémon Adventures

In Robust Rotom, Diamond served Platinum some Old Gateau for tea time during their stay at the Old Chateau.

Old Gateau's name in both English and Japanese is a pun based on the location it is found. In English, the French word gateau ("cake") plays on Chateau. In Japanese, the Chateau's name is "Forest Manor" (Japanese: もりのようかん) while the Gateau's name is "Forest Yōkan" (Japanese: もりのヨウカン); the two terms are homophones and are pronounced as mori no yōkan.
According to the anime, the Old Gateau is also known as the "Mirage Gateau".
In the games, "Old Gateau" is usually pluralized as "Old Gateaux". However, the description of the Souvenir Set in Join Avenue says "A set of two Old Gateaus. The cake heals all the status problems of one Pokémon."