Originally, I managed to plug holes in one episode (#27 "Hypno's Naptime"), while holes in 9 ("The School of Hard Knocks"), 18 ("Beauty and the Beach", which was very heavily edited), 66 ("Snow Way Out!", which had some cuts due to Meowth lighting a lot of matches) and 78 ("Fire and Ice", which had a small timecut) couldn't be restored. By replacing the song in episode 78, I was able to add the original uncut scene (which had no dialogue) to the episode. The other episodes are fillers, though I'd like to eventually add them.
Actually, I'm close to having a usable ep.9 - it just needs a single line of dialogue added.
In the 4KIDS dub, the opening scene ends with Brock saying "Maybe if you spent less time arguing and paid more attention to where we're going, we'd already be in Vermillion City by now. Come on, we're already late. We've got to start the show!" (an uncharacteristic fourth-wall breach by Brock), and Pikachu waves. Circle out. Title card.
Now originally, instead of Brock saying "Come on, we're already late", etc. - Pikachu's trying to get everyone's attention in the line before, and at this point there's the circle out. Then Misty grabs a hammer and whacks Brock with it, saying something at him between her teeth. (I still have to find dialogue to put here.) Episode resumes as usual.
In the current test dub, the line goes "Maybe if you spent less time arguing and paid more attention to where we're going, we'd already be in Vermillion City by now. Come on!" and Misty whacks him.