"Come on, Charizard!" Ash said. "We've got to go!"
Charizard roared at Ash.
"I know you don't respect me," Ash replied. "I know you don't want to do anything I say! But you've got to help, or I don't know what will happen but it can't be good!"
Charizard roared again, spitting out flame, then actually noticed where they were.
The iced-over sea was something he'd seen already. But Ash was on the sea, and there was a broken bit of metal from somewhere, and a rope that had been hastily tied to it.
"We've got to get to Ice Island, to find that treasure!" Ash said. "Please, Charizard! We need to do this!"
Charizard looked where Ash was pointing.
Then up at the Legendary Pokémon battling overhead.
Down at Ash.
"This is a one off!" he roared, not that Ash could understand him, and grabbed the rope. "But I get that you need a tow to pull you and your MASSIVE BALLS around!"
AN:
The exact position of the second movie relative to Charizard Chills isn't quite clear, but it could be either side.
This is a take where the movie comes before Charizard Chills.
As an aside, Charizard Chills is an excellent title and one of the best the dub ever produced. Because it's both what happened to Charizard (he nearly freezes) and what he does – he chills out.