Green PathFireRed&LeafGreen
"Stretches of open sea linking Six Island to Seven Island and the Trainer Tower. One of the quieter surfing routes in the Sevii chain."
GREEN PATH MAP
Water route linking the Five Island area to Six Island. Surf straight through, open water with no obstacles. Part of the main Sevii island-hopping path.
Pokemon Encounters
Water route with surfing and fishing only. Qwilfish at 40% and Horsea at 40% fill the Super Rod. Seadra at 4% is the rare catch if you keep casting. Tentacool covers the surface.
Magikarp
Also found in 41 other locations
ITEMS
Sweep with the Itemfinder for a hidden Ultra Ball. Only pickup on this water stretch between islands.
Ultra Ball
A very high-grade BALL that offers a higher Pokemon catch rate than a GREAT BALL.
Ultra Ball
A very high-grade BALL that offers a higher Pokemon catch rate than a GREAT BALL.
TRAINERS
One Psychic trainer with a team near level 50. Over before it starts.

Jaclyn
Green Path Guide
Yes. Several routes have version-exclusive encounters. FireRed gets Oddish, Growlithe, Scyther, and Electabuzz in certain areas, while LeafGreen gets Bellsprout, Vulpix, Pinsir, and Magmar. Check the encounter table for this route and look for the version tag next to each Pokemon.
After battling a trainer, walk 100 steps to recharge it, then use it while standing on the route. Nearby trainers ready for a rematch get an exclamation mark over their head. Rematched trainers carry stronger teams as you progress through the game. You get the VS Seeker from a girl in the Vermilion City Pokemon Center.
Islands One through Three unlock after you beat Blaine on Cinnabar Island. Bill takes you there as part of the story. Islands Four through Seven require beating the Elite Four first, then completing Celio's Ruby and Sapphire quest on One Island to get the Rainbow Pass.
You can physically reach all seven islands without it, but evolved Johto Pokemon only show up in the wild after you get the National Dex. That means 60 or more Pokedex entries plus completing Celio's quest. If you're only seeing Kanto species, that's why.
