you get a water thingy and you use it on the tree
If you're talking about the "tree" north of Goldenrod City, get the squritbottle and squirt the tree. It's really a Sudowoodo, and it will attack you.
It can be caught at battle frontier, and a weird tree will be there, and when you water it. It'll battle you which means the tree is sudowoodo. But only one is available, so if you defeat it and save, it'll never come back.
In battle frontier. Go to south-eats part of the island and use wailmer pail on a weird tree.
that big fat guy standing next to where the weird tree(sudowoodo) will give it you.
ok so you have to beat the goldenrod gym leader. then go to the flower shop and talk to the lady she will give you a watering can then you go to the weird looking tree that is actually sudowoodo save if you want to then talk to the tree done
if you mean sudowoodo go battle frontier and use wailmer pail to the weird tree in south-eats near the waterfall
water it with a spray can, its a sudowoodo. you can battle and catch it too, because that is the only one you will find in that game
After getting rid of sudowoodo a fat guy to the right of sudowoodo gives you rock smash.
in goldenrod city. go to the gardeners house on the top right of the city she will tell you about the weird tree(sudowoodo) save before encounter. only encounter in the game
It's a sudowoodo
East of the National Forest.
After beating Whitney, go to the flower shop in Goldenrod City, where you'll get the SquirtBottle. Then, go north to Route 35 and go to the weird tree east of the entrance to the National Park. Use the SquirtBottle on it, and you'll find that it's actually a Sudowoodo that you can battle and catch.