When you complete the Pokedex in Pokemon Ranger almost everybody goes to your party. When you capture Snorlax - thus completing your Browser - Spenser summons you to the Ringtown Ranger base. There, everybody that you have met on your journey (excluding townspeople and the Go-Rock Squad) is assembled to offer you congratulations. They all say your praises and Spenser remakes that you are the first and only Ranger to complete the Browser. He gives you a special symbol which is added to your summary screen from now on. After this, the game is essentially over. If you haven't completed the Manaphy Egg Mission, that is the only thing left to do. Otherwise, it is up to you.