Goosey

The Goose is a large, roughly human-sized goose capable of speaking, it is also an ally of Mario, Luigi, Toad and Princess Toadstool.

In The Super Mario Bros. Super Show! episode "Mario and the Beanstalk / Bats in the Basement" the Goose was shown to be a prisoner of King Koopa, being held in a bird cage suspended from the ceiling in his castle in the sky. With the Goose captured, King Koopa cast a magic spell on it, making it so the only thing the Goose could lay were gold coins.

Later, after Mario, Luigi, Toad and Princess Toadstool were trapped in the cell of the Goose by King Koopa, the Goose was forced by King Koopa to bury them in a shower of coins. As it layed gold coins, the Goose begged Mario to set it free, saying that if he did so, it would help him and his friends escape from King Koopa. Deciding to trust the Goose, Mario scaled a large mountain of gold coins and reached the Goose's cage, the bars of which he bent apart, making an opening for the Goose to step through.

Once freed, the Goose showed Mario a crack in the floor, which had been made by a Garbanzo beanstalk crashing through the floor. Taking the Goose with, Mario, Luigi, Toad and Princess Toadstool crawled through this crack and began to descend the Garbanzo beanstalk to their cottage below.

After fighting several Hoopsters on the beanstalk, the Goose, Mario, Luigi, Toad and Princess Toadstool managed to reach the cottage. As Luigi began chopping down the beanstalk so King Koopa couldn't follow them down, the Goose asked Mario, Toad and Princess Toadstool if there was anyway it could thank them for saving it; hearing this, Mario asks the Goose if it could give them one hundred gold coins that they could donate to the Mushroom Kingdom Orphanage. The Goose responds to this question by saying that it can't lay gold coins anymore, as without King Koopa's magic spell, which was apparently broken when the Goose was taken from King Koopa's castle.

Luckily, when the beanstalk, which Luigi had cut down, fell, it took King Koopa's castle with it; as the castle fell, all the gold coins that the Goose had layed earlier fell from it, showering Mario, Luigi, Toad, the Goose and Princess Toadstool in them. The Goose was last seen trying to lay some eggs for the hungry Mario, Luigi and Toad, only to be surprised to see she could only lay solid gold eggs.