Cinnabar Island

Walkthrough
At the end of Route 20, you will arrive at Cinnabar Island. This small island is home to next Pokemon Gym; however, it will be locked upon your arrival. Because of this, you will have to venture through the Pokemon Mansion on the island in order to find the key to open the Pokemon Gym. Cinnabar Island is also home to a research lab that will revive your fossils into Prehistoric Pokemon.

Move Tutors
Metronome: Move Tutor Can Be Found In Research lab

In Game Trades
Electrode: Other Trainer Requests Raichu In Return
Tangela: Other Trainer Requests Venonat In Return
Seel: Other Trainer Requests Ponyta In Return

Gift Pokemon
Omanyte: Revive Helix Fossil At Research Lab
Kabuto: Revive Dome Fossil At Research Lab
Aerodactyl: Revive Old Amber At Research Lab

Wild Pokemon
Surfing:
Tentacool (100%): Levels 5-40

Old Rod:
Magikarp (100%): Level 5

Good Rod:
Horsea(FireRed)/Krabby(LeafGreen) (60%): Levels 5-15
Krabby(FireRed)/Horsea(LeafGreen) (20%): Levels 5-15
Magikarp (20%): Levels 5-15

Super Rod:
Shellder(FireRed)/Staryu(LeafGreen) (40%): Levels 15-25
Horsea(FireRed)/Krabby(LeafGreen) (40%): Levels 15-25
Gyarados (15%): Levels 15-25
Seadra(FireRed)/Kingler(LeafGreen) (4%): Levels 25-35
Psyduck(FireRed)/Slowpoke(LeafGreen) (1%): Levels 25-35

Items
Tri-Pass: From Bill After Defeating Cinnabar Island Gym

Poke Mart Items:
Ultra Ball, Great Ball, Hyper Potion, Revive, Full Heal, Escape Rope, Max Repel