Raven, in normal battles I'd hate to ask for you to use this technique (normally, I don't use it), but in battles where no moves are banned, like this one, this could seriously turn the tables around if we were to get into a pinch later on. Sing a haunting Perish Song, then use your small size to your advantage to blast the Espeon with a Dark Pulse. Finish by flying just out of Imperial's physical move range, and above Solvee, and drop a Toxic on her.
Hydronix, that last Grass Knot was painful, so use a Blizzard to freeze this one and simultaneously blast Solvee, then do your best to fight the Psychics with your massive size while Yawning again at your two opponents, then blasting Imperial with a Hydro Pump.
Raven: Perish Song ~ Dark Pulse (Solvee) ~ Toxic (Solvee)
Hydronix: Blizzard (to try and freeze the Grass Knot, and to also hit Solvee) ~ Yawn (both Solvee and Imperial) ~ Hydro Pump (Imperial)