Pokémon Red and Blue/Pokémon Mansion

New Pokémon Available

Red	Blue	Yellow
Ponyta Koffing Grimer	Ponyta Koffing Grimer Magmar	Growlithe Ditto Grimer

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!

The Mansion

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 (every statue here has one), 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.

There are a number of valuable items and Pokémon here. 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 TM's TM 22 is the most powerful Grass attack, Solar Beam, 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. Also fight all the Burglars that you can—they'll give you good EXP and a ton of cash.

File:Pokemon RBY PokeMansion F1.png

Floor 1

1	Scientist	1450
	Electrode	LV29
	Weezing	LV29
A	Escape Rope
B	Carbos

Statues

Unlocking the many doors throughout Pokémon Mansion is no more difficult than 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.

File:Pokemon RBY PokeMansion F2.png

Floor 2

1	Burglar	3060
	Charmander	LV34
	Charmeleon	LV34
A	Calcium

File:Pokemon RBY PokeMansion F3.png

Floor 3

1	Burglar	3420
	Ninetails	LV38
2	Scientist	1650
	Magneton	LV33
	Magnemite	LV33
	Voltorb	LV33
A	Max Potion
B	Iron

Leap of Faith

The Secret Key to the local gym is in the basement, but you must go upstairs first. As you explore, flip the switches on the statues to open the electronic doors. Make your way up to the third floor and leap off the ledge in the bottom right corner. You'll land in the basement. Defeat a nearby trainer to open another door. Follow the hall to find the key.

File:Pokemon RBY PokeMansion B1.png

Basement 1

1	Burglar	3060
	Growlithe	LV34
	Ponyta	LV34
2	Scientist	1700
	Magnemite	LV34
	Electrode	LV34
A	TM 14
B	Full Restore
C	Rare Candy
D	TM 22
E	Secret Key

Ditto that

The Mansion's basement is the one and only chance for Yellow players to catch a shape shifting Ditto before the Elite Four.

Pokémon Mansion encounters

	Floor 1			Floor 2			Floor 3			Basement 1
Koffing	35%	6%	N/A	35%	6%	N/A	25%	6%	N/A	45%	6%	N/A
Weezing	10%	4%	N/A	10%	4%	N/A	20%	4%	N/A	15%	4%	N/A
Grimer	6%	35%	20%	6%	35%	20%	6%	25%	20%	6%	45%	20%
Muk	4%	10%	N/A	4%	10%	20%	4%	20%	20%	4%	10%	10%
Rattata	N/A	N/A	30%	N/A	N/A	30%	N/A	N/A	30%	N/A	N/A	N/A
Raticate	N/A	N/A	30%	N/A	N/A	30%	N/A	N/A	30%	N/A	N/A	40%
Vulpix	N/A	15%	N/A	N/A	15%	N/A	N/A	15%	N/A	N/A	15%	N/A
Growlithe	15%	N/A	20%	15%	N/A	N/A	15%	N/A	N/A	15%	N/A	N/A
Ponyta	30%	30%	N/A	30%	30%	N/A	30%	20%	N/A	15%	15%	N/A
Ditto	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	10%
Magmar	N/A	N/A	N/A	N/A	5%	N/A	N/A	10%	N/A	N/A	5%	N/A

#88 Grimer	#109 Koffing
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.	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 Self Destruct 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 he's any good. Arcanine is probably the best of the Fire Pokémon (although Blue players would need to trade for one), but Charizard, Ninetails (if you didn't evolve him until after learning Flamethrower as Vulpix) and possibly even Flareon are all better picks than Magmar in Blue. Not that you shouldn't try hard to catch a few: Red and Yellow players will be desperate to trade for it!