So if there were zombies in the older games....but in the newer ones there are like ganados and they are called Los Plagas 1 and 2.So......What are the zombies?Are they just mere Mutated beasts?Because the older games all lead up to the story in RE5.So i wonder what are they?

I think zombies are infected with the T Virus?

the los plagas is completly diff from the t-viirus

the t- virus kiilled the host and re animated them

the plagas is a parasite

The zombies were an accident, useless as bioweapons. Gannados & Majini are infected with a parasite, much like Nemesis.

T usually depletes the hosts intelligence, while a parasite actually controls the host, basically making them intelligent, which is why Gannados or Majini, like Nemesis or TALOS, were able to use weapons like crossbows or AK47's.

T-Virus and Plagas are different but both are equally lethal

The Zombies in the Resident Evil Series are Under the Genra of TechnoZombies. Techno Zombies are created via a form of technology, where as the Romero Zombies are created via some natural virus.

T-virus and Las Plagas are unrelated to eachother. The zombies in the first games were side effects of an accidental break out of the t-virus. Umbrella was trying to create viral weaponry and bio weapons such as the Nemesis. Las Plagas neither kills its host nor re animates it, which are two major traits of the tvirus.