He is a koala child with dark grey fur and wears a red vest.
He is a kind child who, while wary of humans, took a liking to Aladdin after he risked his life to save him and tried to prove to Queen Kimbla that at least Aladdin was a good human, even if not all are.
When Aladdin first happened upon him, the Koala Kid was climbing the dam. But the cliffs gave way beneath him, so Aladdin and Carpet decided to rescue him. Aladdin saved the Koala Kid but ended up injuring his arm in the process.