Where can you find oddish in Pokemon Pearl?

You can find Oddish in Route 206, Route 208, and Route 209 in Pokémon Pearl. It's a Grass-type Pokémon, so it's more likely to appear in areas with lots of grass and trees.

Here's some additional information:

* Route 206: This route is accessible after you beat the second gym leader, Gardenia. Oddish can be found in the tall grass patches along this route.

* Route 208: This route is located between Hearthome City and Pastoria City. It's a vast route with various environments, and Oddish is found in the grassy areas.

* Route 209: This route is situated between Pastoria City and Celestic Town. You can find Oddish in the grassy areas along this route.

Remember that Pokemon appearances are random, so you might need to explore these areas for a while to encounter an Oddish. Good luck!