On their wat to Ecruteak City, Ash and co. are dismayed that the bridge will be out for six months. They encounter a fisherman who says he'll take them across the river if they can catch a Sudowoodo. While trying to find one Ash encounter two arguing scientists named Pierre and Marie. They are fighting over what type Sudowoodo is. Who is more right, and why does Sudowoodo have a fear of water?
The scientists are named after Pierre and Marie Curie.
The entire plot of this episode revolves around Ash and co. trying to get across the river, but they never think of using their water Pokémon (Totodile, Staryu and Goldeen) to carry them across as they've done many times before.
Pierre and Marie argue over whether Sudowoodo is a Grass-type or a Rock-type, but no one ever considers that it could be dual-type and be both.
Everyone is surprised that Sudowoodo, or any Pokémon, would use old dried leaves for a Razor Leaf attack, suggesting that Pokémon with this attack do not produce the leaves they use, but instead keep a store of them on or in their bodies.