Dizziness is a common ability flaw for Starfy and Starly usually when they try to use the Star Spin more than three times consecutively. When you get dizzy you can't move for a few seconds making you vunerable for damage from enemy attacks or obstacles. The most common way to get dizzy is using the Star Spin, but you can also get dizzy from small tornadoes as well as a few enemy attacks (like Ogura's hand slaming attack for example). Enemy or obstacle damage will also cancel dizziness out allowing you to be able to move again right away.
In Densetsu no Starfy 4, Starfy and Moe will get dizzy together almost right away after using the Powerful Spin.
