Welcome to Smogon! Take a moment to read the Introduction to Smogon for a run-down on everything Smogon, and make sure you take some time to read the global rules.
In pokedex there should be which generation is it from should be given it will help in making generation 5 team or any other team. It will make generation of 1 to 6 team faster.
Pastgensdexesdoexist. Each Pokemon entry also has tabs across the top, so you can quickly see what it did in each generation (and which generation it came from, based on what the earliest tab is)