As of now, no. But if Larvitar (or anything with a double weakness and <100 defence) ever becomes a tier 4 raid boss, it would be soloable. Up 0 Down
I've seen someone do that, not to solo a raid, but they showed up for a legendary, set three phones down and tapped two with their thumb and pinky. Up 0 Down
Psh. What a scrub. I saw someone with a clipboard with 8 phones attached to it. Unfortunately, didn't see him doing a raid though. Up 0 Down