I noticed that only the Mothim did not do anything. They should have helped the Zubat. I think the Rattata used Thunderbolt and the Nidoran used Helping Hand, like you said.Funny how all the Pokemon helped out except the Mothim. Even the group of Zubat got something to do, since they put the sled in the water when it was built, but the Mothim didn't do anything the whole time.
Thunderbolt, you mean. And Nidoran can also learn Helping Hand, so it could've been that as well.
Anyways, I actually did like this episode. Having Swampert did not seem random to me because it showed Grotle's defense when Swampert used Focus Punch and Grotle has 4X advantage against Swampert.