Location from pokemon-adventures-frlg by
Ultima's island -- where Red, Blue, and Green underwent brutal training to learn the three ultimate moves that would decide the final battle.
Two Island exists in this arc as a place of transformation. Red and Blue arrive reluctantly, bound together by Ultima's magical rings, and leave as trainers capable of techniques that transcend normal battle. Cape Brink is Ultima's domain -- a rocky headland where the wind never stops and the training never relents. The three trials -- Skipping, Catching, Battling -- tested different aspects of the trainers' abilities. Red's Venusaur learned Frenzy Plant. Blue's Charizard learned Blast Burn. Green, characteristically, bypassed the trials and taught her Blastoise Hydro Cannon through sheer cleverness.
A lush island with Cape Brink at its northern tip -- a windswept promontory where Ultima lives and trains her students. The interior is heavily forested, with training grounds carved into natural clearings. The paths between Cape Brink and the town are winding and treacherous, part of the training regimen.
Also known as: Two Island, Boon Island