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Japanese name: Mt. Otsukimi

A complex cave that connects Pewter City to Cerulean City, this is the first cave that players will enter.

Features

Mt. Moon contains several floors, and many trainers. On the upper floors, conventional trainers await the player, whilst on the lower floors Team Rocket hunt for fossils that they can steal.

• There are many items to be found in Mt. Moon. On the first floor, TM12 Water Gun is west of the Route 3 entrance, as is a Potion. In the southeast corner is a Rare Candy, and north of that is an Escape Rope. A second Potion is to the east of the entrance. In the northwest corner is a Moon stone. A second Moon Stone can be found southeast of the fossils. In the room accessible from the first ladder, there is an HP Up, and from the second ladder there is an Ether and TM01 Mega Punch.

Events

• On the lower floor, the player will encounter Team Rocket for the first time. They are hunting for fossils that they can sell on the black market.

• Towards the end of the cave, you will find two fossils: the Dome fossil and the Helix fossil. The nearby Super Nerd says he found them first, but agrees that the player can have one as long as he can keep the other.

• In Yellow version, shortly after picking a fossil the player will encounter Jessie and James for the first time.

Ekans Lv. 14	Meowth Lv. 14	Koffing Lv. 14

• In Red and Blue versions, a normal Rocket grunt challenges the player instead of Jessie and James.

Wild Pokemon

1F
Zubat	Geodude	Paras	Clefairy	Zubat	Geodude	Sandshrew	Clefairy
Lv. 6-11	Lv. 8-10	Lv. 8	Lv. 8	Lv. 6-11	Lv. 10	Lv. 12	Lv. 11
79% (Red and Blue only)	15% (Red and Blue only)	5% (Red and Blue only)	1% (Red and Blue only)	75% (Yellow only)	20% (Yellow only)	4% (Yellow only)	1% (Yellow only)

B1F
Zubat	Geodude	Paras	Clefairy	Zubat	Geodude	Paras	Clefairy
Lv. 7-11	Lv. 7-9	Lv. 10	Lv. 9	Lv. 8-11	Lv. 10-11	Lv. 9-11	Lv. 10-12
60% (Red and Blue only)	26% (Red and Blue only)	10% (Red and Blue only)	4% (Red and Blue only)	65% (Yellow only)	20% (Yellow only)	10% (Yellow only)	5% (Yellow only)

B2F
Zubat	Geodude	Paras	Clefairy	Zubat	Geodude	Paras	Clefairy
Lv. 9-12	Lv. 9-10	Lv. 10-12	Lv. 10-12	Lv. 10-13	Lv. 11	Lv. 13	Lv. 9-13
54% (Red and Blue only)	25% (Red and Blue only)	15% (Red and Blue only)	6% (Red and Blue only)	60% (Yellow only)	15% (Yellow only)	15% (Yellow only)	10% (Yellow only)

Trainers

1F

B2F

Screenshots