Reminder that Mavuika > Neuvillette in strength.
Mavuika has beaten Goythototh, who is abyss entity, and abyss entity can perfectly mimic Teywat lifeforms, and during that battle it was perfectly mimicking Pyro Sovereign.
This means Mavuika solo'd Pyro Sovereign. (Clownveler who jobber to Arlecchino doesn't count as help)