Unira

A Unira is an item in Super Smash Bros. Brawl, coming from the game Clu Clu Land. It is a type of Sea Urchin encountered in the said game, acting as an enemy. In fact, they have been referred to as Sea Urchins in other English localizations, but are known under their Japanese name in Super Smash Bros. Brawl. In said game, the Unira can be picked up and tossed at opposing players. After being thrown, its spikes pop out damaging all except the one who threw it. An interesting note about the Unira is that when someone stand close enough to it, it actually draws them toward itself.

A Unira can change "possession", so to speak, if it is attacked. For example, if Kirby throws it, the Unira will not harm Kirby; however, if Mario attacks the Unira, its properties will change and cause harm to Kirby while not damaging Mario.

Unira are also seen in WarioWare: Twisted!, in the microgame Clu Clu Land, and in WarioWare: Smooth Moves, which features another microgame of the same name.

Trophy Information from Super Smash Bros. Brawl
''In Clu Clu Land, the Unira hid gold ingots in an underwater maze, then tried to stop Bubbles from getting them. In Super Smash Bros. Brawl, you can attack an Unira to send it bouncing away. Any fighter it hits will go sprawling. If it hits a wall, it'll bounce back, and if you hit it with a powerful attack, it will transfer the attack to whomever it hits and launch them.''