Wait I remember this. This was from the first episode of Pokemon I ever watched. I think it was part two of a storyline where Ash, Pikachu, Misty, Brock and Team Rocket went on this Pokemon cruise ship and some accident made the boat tip upside down. Most of the people got off the ship before it sank, but Ash, Pikachu, Misty, Brock and Team Rocket ended up stuck inside and they had to work together in order to get back from the surface.

The above scene takes place either shorty before or shorty after a battle with a Gyarados (it’s a long story). Don’t worry Team Rocket aren’t dead, just knocked out (They still appear in the next 700 episodes anyway). They quickly wake up before they get completely pushed into the ocean, though Meowth accidentally ends up in the water anyway. This leads to a pretty funny scene where after Mewoth climbs out of the water, Pikachu frustratingly snaps his fingers almost like he’s saying “Rats, I was hoping he was dead.”