Jenova Round 1 --- Defeated (6) Mother Brain, 39709 [55.79%] - 31468 [44.21%]
Jenova Semifinal --- Lost to (2) Liquid Snake, 33694 [44.38%] - 42224 [55.62%]
Extrapolated Strength --- 13th Place [21.38%]
Lavos is another of the several characters who are likely exclusive to the Villain Contest due to not being strong enough to get enough nominations to get into a regular contest, but he made a decent enough splash in said Villain Contest to not be a wasted spot.
It was fairly expected that Lavos would make the contest, and it was even expected that Lavos would win his first match over Mother Brain. Both are little-known villains who never speak, and it came down to exposure and the popularity of the games they appear in for that particular match. The only argument that could be made for Mother Brain was being the main villain of Captain N, but most people have never heard of that show.
What wasn't expected however was how much Lavos would benefit from being in Chrono Trigger, specifically how badly he exposed Liquid Snake come the second round of the Villain Contest. Sure Lavos lost, but given Liquid's Summer 2004 Xst placement and Liquid's mauling of Tenpenny in the first round of this contest, Liquid was expected to completely kill Lavos in this match. Liquid did no such thing, and the cries of Liquid being overrated and exposed were heard loud and clear as Lavos held Liquid to a relatively low percentage throughout the match.
We may never see Lavos in another of these things, but his time in the sun was time well spent.