The Maximals are the main protagonists of the Transformers: Beast Wars. They are descendants of the Autobots who had fought hundreds of years ago against the Decepticons who were the ancestors of their enemies; the Predacons.
Like their ancestors, the Maximals had to fight their rival race of robots to restore peace to the galaxy.
In the series finale, Cheetor and Rattrap are the only original maximals from the beginning of the Beast Era to survive all the way through in the end. As such, they each have the last lines of the series.
The only maximals that lived in the end of the Beast Wars series, are Cheetor, Rattrap, Silverbolt, Blackarachnia, Nightscream and Botanica.