Trojan is mainly concerned with keeping order inside Tagg's laptop and doesn't really battle, making him an oddity amongst Tagg's mons.
- Age: At least 10
- Met: PEFE HQ
- Ability: Unknown
- Ball: Poké (Rarely used since he lives inside Tagg's laptop)
Trojan doesn't battle, so his main specialty is in the infiltration of security systems (Hence his name) and the defense of his home computer, which is what Tagg uses him for when he's not serving as an antivirus.
Trojan hasn't been seen battling.
- He and Tropius appear to be friends, as he let him use Tagg's laptop to inform Tangent of the Very Bad Thing without incident.
- Hacking into the Unova government's software to inform Tagg about Ghetsis escaping from prison.
- Defeated Legion in tandem with Gamma.
- Trojan refers to Trojan Horse viruses.