Pokémon Red and Blue/Pokémon Mansion

Buried somewhere in the rubble of Pokémon Mansion is the Secret Key that opens the Cinnabar Island Gym. There are plenty of salvageable items amongst the wreckage, as well as clues regarding the dangerous experimental Pokémon that escaped. Hunt carefully, as there are lots of powerful Pokémon here as well!

Pokémon Mansion

Dr. Fiji's Journal

The pages from Dr. Fuji's journal are scattered about the mansion. These entries detail the discovery of a Pokémon known as "Mew".

Unlocking the many doors throughout Pokémon Mansion requires pressing the buttons on the statues on each floor. The maps show you the doors in their default positions, so you can predict which ones will disappear when you press the buttons. Push them as needed to make your way through the level and collect all the items.

Ditto that

The mansion's basement is the only chance for Yellow players to catch a shape-shifting Ditto prior to the Elite Four.

Yellow players can pick up a Growlithe and a Ditto. Red and Blue can get a Ponyta, and Blue can also get an ultra-rare, Blue-exclusive Magmar.

The items include a number of stat-enhancing supplements, and two TMs. TM 22 is the most powerful Grass attack, Solarbeam, and TM 14 is the super-powerful Ice attack Blizzard, which you'll definitely need for the Elite Four. There is also a hidden Moon Stone in one of the pillars on Floor 1, right after you enter the mansion. There is a hidden Max Revive on Floor 3, at the top of the narrow path above marker A. There is a Rare Candy in the basement, in the room with the Secret Key near the top-left corner (above the plants). Also fight all the Burglars that you can — they'll give you good EXP and a ton of cash.

Getting the Gym key

The door to the Gym is locked, and rumors suggest the key is lost in the abandoned mansion. You can get through the mansion fairly quickly, but the random Pokémon that lurk here, especially a wild Muk, can be fierce.

To get the key, take the stairs to the main part of Floor 3 (A to C), search the statue for a hidden switch, then jump down the first balcony near a scientist marked point D. The stairs here will take you to the basement where the Secret Key lies. Flip all of the switches you pass and you'll find it without much trouble.

1F

1F

1	Scientist
A	Escape Rope
B	Carbos

Trainers

Red and Blue
Trainer	Pokemon
Scientist Reward: 1450	Electrode Lv. 29 Weezing Lv. 29

Yellow
Trainer	Pokemon
Scientist Reward: 1450	Electrode Lv. 29 Weezing Lv. 29

Pokémon found

Red
Pokémon		Level	Rate
	Growlithe	34	10%
	Ponyta	28,30,32,34	40%
	Grimer	30	5%
	Muk	39	1%
	Koffing	30,32	40%
	Weezing	37	4%

Blue
Pokémon		Level	Rate
	Vulpix	34	10%
	Ponyta	28,30,32,34	40%
	Grimer	30,32	40%
	Muk	37	4%
	Koffing	30	5%
	Weezing	39	1%

Yellow
Pokémon		Level	Rate
	Rattata	34,37	35%
	Raticate	34,37	25%
	Vulpix	26,30,34,38	20%
	Grimer	23,26	20%

2F

2F

1	Burglar
A	Calcium

The first page of Dr. Fuji's journal is in the northeast corner. The second page is in the southwest corner.

Trainers

Red and Blue
Trainer	Pokemon
Burglar Reward: 3060	Charmander Lv. 34 Charmeleon Lv. 34

Yellow
Trainer	Pokemon
Burglar Reward: 3060	Charmander Lv. 34 Charmeleon Lv. 34

Pokémon found

Red
Pokémon		Level	Rate
	Growlithe	32	25%
	Ponyta	28,30,32	25%
	Grimer	30	5%
	Muk	37	1%
	Koffing	30,34	40%
	Weezing	39	4%

Blue
Pokémon		Level	Rate
	Vulpix	32	25%
	Ponyta	28,30,32	25%
	Grimer	30,34	40%
	Muk	39	4%
	Koffing	30	5%
	Weezing	37	1%

Yellow
Pokémon		Level	Rate
	Rattata	34,37	35%
	Raticate	34,37	25%
	Grimer	26,29,32,35	35%
	Muk	35,38	5%

3F

3F

1	Burglar
2	Scientist
A	Max Potion
B	Iron

The next page of Dr. Fiji's Journal is in a room that can only be accessed from stairwell B.

Trainers

Red and Blue
Trainer	Pokemon
Burglar Reward: 3420	Ninetales Lv. 38
Scientist Reward: 1650	Magnemite Lv. 33 Magneton Lv. 33 Voltorb Lv. 33

Yellow
Trainer	Pokemon
Burglar Reward: 3420	Ninetales Lv. 38
Scientist Reward: 1650	Magnemite Lv. 33 Magneton Lv. 33 Voltorb Lv. 33

Pokémon found

Red
Pokémon		Level	Rate
	Growlithe	33	15%
	Ponyta	32,34,36	24%
	Grimer	34	5%
	Muk	42	1%
	Koffing	31,35	40%
	Weezing	38,40	15%

Blue
Pokémon		Level	Rate
	Vulpix	33	15%
	Ponyta	32,36	14%
	Grimer	31,35	40%
	Muk	38,40	15%
	Koffing	34	5%
	Weezing	42	1%
	Magmar	34	10%

Yellow
Pokémon		Level	Rate
	Rattata	40,43	35%
	Raticate	40,43	25%
	Grimer	32,35,38	35%
	Muk	38,41	5%

B1F

B1F

1	Burglar
2	Scientist
A	TM 14
B	Full Restore
C	Rare Candy
D	TM 22
E	Secret Key

The final page for Dr. Fiji's Journal is next to a Burglar and a Pokémon statue.

Trainers

Red and Blue
Trainer	Pokemon
Burglar Reward: 3060	Growlithe Lv. 34 Ponyta Lv. 34
Scientist Reward: 1700	Magnemite Lv. 34 Electrode Lv. 34

Yellow
Trainer	Pokemon
Burglar Reward: 3060	Growlithe Lv. 34 Ponyta Lv. 34
Scientist Reward: 1700	Magnemite Lv. 34 Electrode Lv. 34

Pokémon found

Red
Pokémon		Level	Rate
	Growlithe	35	15%
	Ponyta	32,34	15%
	Grimer	35	5%
	Muk	42	1%
	Koffing	31,33	50%
	Weezing	40,42	14%

Blue
Pokémon		Level	Rate
	Vulpix	35	15%
	Ponyta	32,34	15%
	Grimer	31,33	50%
	Muk	40	10%
	Koffing	35	5%
	Weezing	42	1%
	Magmar	38	4%

Yellow
Pokémon		Level	Rate
	Raticate	37,40,43,46	40%
	Grimer	35,38	40%
	Muk	41	10%
	Ditto	12,18,24	10%

New Pokémon

#88 Grimer

You've been fighting these guys for ages, but you've never had an opportunity to catch one until now. No big loss: Grimers (and the evolved Muk) are literally garbage. Well, maybe that's a bit harsh. It's just that Poison-types are the worst in the game, in that no Poison skill (except for maybe Toxic, which you have to use a TM to teach him) is good against the quickly-defeated computer opponents. But at least Muks get a high Attack score and decent HP.

#109 Koffing

Team Rocket's bizarre affinity for these gaseous blobs is probably one of the reasons they lose so much. To be fair, evolved Weezing is probably the best of the Poison Pokémon, but that still doesn't make them particularly useful. At higher levels, fear their Selfdestruct and Explosion skills... Too bad their most powerful attacks knock themselves out too!

#126 Magmar

Magmar is both hard to catch and exclusive to Blue, but that doesn't necessarily mean it's any good. Arcanine is probably the best of the Fire Pokémon (although Blue players would need to trade for one), but Charizard, Ninetales (if you didn't evolve it until after learning Flamethrower as Vulpix) and possibly even Flareon are all better picks than Magmar in Blue.