Spinner Problems is one of the first quests you'll come across in Coromon and it's fairly easy for beginners.
You can find the Spinner Problems quest in Radiant Park. Speak to a guy named Jerome.
Jerome is being trained on how to capture Coromon, unfortunately he isn't very good at it.
He asks you to capture a Coromon for him- any will do. Head into the tall grass in Radiant Park and capture any Coromon.
To capture a Coromon, weaken it in battle and then use a Spinner from the Item Menu.
Hand it over to Jerome and his instructor will berate him for not capturing it himself.
He hands you the Coromon back, along with a reward.
Reward: Silver Spinner x2