Well the Red Gyarados going on a rampage part was good. It kinda followed the games :/
I liked that Lance captured it. Though it didn't serve a purpose until later in the serious. I believe he uses it in Hoenn.
Anyway, Pryce appearing was great. But I wish he would have done something more, so 8/10
I was never expecting to see the red gyarados again in the anime when it returned to Hoenn. What else were you expecting him to do?! He appeared in the last 5 minutes of the eopisode so there wasn't really much else to do. Plus, he was in the following two episodes.
I didn't really like Lance's voice and everytime I saw him, all I could think about was Vegeta of off Dragonball Z.