Alakazam used to be a normal monkey until he took the steps to become the king of his kind. As ruler, he quickly becomes selfish and cold-hearted, caring only for power and his own whims. Determined to defeat even the most powerful rulers of the land, Alakazam sets forth to prove his might, not realizing that soon he'll be forced to embark on an even more grand adventure...
Unico is a special unicorn with the ability to make anyone he meets happy. But the gods are not pleased, and out of jealousy, they bid the West Wind to exile young Unico to the Hill of Oblivion, where he shall stay, alone, forever. Luckily, the West Wind is a kind soul and instead, hides Unico away from place to place, keeping him shielded from the eyes of the gods. Along the way, Unico must make new friends and even save the world from an evil power!
I get that this is a weird recommendation since the plots are so dissimilar, but hear me out. Unico and Alakazam will easily appeal to the same type of person - they're musical, older titles with similar animation, and are good for the kiddies.
Both of these animes have certain qualities in common. Singing animal protagonists that have magical abilities. Moral lessons (at least 2 per anime). And some dark points to add to those moral lessons. If you liked one, you'll probably like the other.
When the pirate cat Flint leaves young Jim and his mouse companion Gran a map to Treasure Island, the two find themselves swept up in a glorious adventure. On the high seas the duo encounters sea creatures and destroyed ships galore; but most importantly, they find themselves prisoners aboard the ship of the dreaded Long John Silver. Alongside Kathy, Flint’s granddaughter, Jim and Gran will brave violent storms, try to keep the map safe, and ultimately try their best to find the treasure before their captors do first!
This is another potentially strange recommendation. Animal Treasure Island indeed has a lot of animal pro/antagonists (though the main two characters are humans), just like Alakazam. What struck me about this pair is that Animal Treasure Island is damned good, and just as historically relevant. Alakazam is based on a manga by Tezuka, yes - did you know that Animal Treasure Island had Miyazaki as a chief animator? Beyond that, Animal Treasure Island is flat out fun, beautifully animated, and will appeal to you if you liked the adventure/fantasy aspects of Alakazam. Please do try it out.
One night, a meteor came crashing down on a magical planet, carrying with it a monkey whose body is as hard as stone. With this unusual power, the monkey soon becomes the king of the monkeys atop Flower Fruit Mountain, and rules with a selfish, egotistical and controlling fist. While evil ruler of the underworld wants to mold the monkey into a tool of his using, the forces in the heavens want to make certain the monkey doesn’t threaten the balance between humans and the wild. With the forces of good at his feet, the stone monkey sets forth to gain the ultimate divine power so that he may strike down his enemies where they stand!
Don't get me wrong, Monkey Magic is one of the worst titles ever. Still, it's one of the few Saiyuki anime, like Alakazam, that focuses on Goku and how much of a selfish ass he is. Since the plots are so similar (unlike, say, the bishounen and long running title Gensou Maiden Saiyuki), consider this a tenative recommendation.