From the Super Mario Wiki
Sharewood Forest is a large forest located near the town of Sharewood Village; not much of Sharewood Forest, such as what creatures live in it, is seen.
In The Super Mario Bros. Super Show! episode "Hooded Robin and His Mario Men", Sharewood Forest is only briefly seen. Mario, Luigi, Toad and Princess Toadstool, while searching for Sharewood Village, became lost in Sharewood Forest, and soon found themselves caught in a net and suspended from a tree; Mario, Luigi, Toad and Princess Toadstool were eventually saved from the Koopa Troopas who had captured them by Hooded Robin, who, using his ability to imitate voices, pretended to be the Sheriff of Koopingham and ordered the Koopa Troopas to leave and collect all the daisies they could find in Sharewood Forest.