Viralien

Viralien is a Poison/Cosmic-type Pokémon introduced in Generation Neo-I.

It evolves from Virogen when leveled up in the presence of the Viral Reactor (RC)/Bacterial Catalyst (MS) starting at level 28.

Biology
Viralien is a taller, more complex version of its predecessor Virogen. It resembles a viral bacteriophage, with several legs sprouting from its thin body like a tripod. A devilish grin now adorns its face, though its facial features are only represented by flashing lights, as though it is an alien spacecraft.

Triva
Viralien is based off of viruses, particularly bacteriophages. Their resemblance to alien spacecraft/tripods may be a reference to either the "diseases from other worlds" theory as well as the extraterrestrial antagonists from The War of the Worlds.

Viralien may be a combination of virus and alien.