This is a page showing detailed info about Mario's special moves, including moves that can be used through the customization feature.
Neutral Special Moves
Fireball is Mario's standard Special Moves. On this move, Mario throws a fireball at the opponent, Mario can throw two fireballs at a time. The Fireball itself is a somewhat slow projectile that can be easily dodged and if hit, it doesn't gives much damage at the opponent.
Origin: Super Mario Bros. (1985)
Custom A: Iceball
Iceball is one of Mario's two custom standard Special Moves. It works similar to the Fireball, with the exception that it freezes the opponent for a short time. If Mario attacks the opponent that is already frozen, the character will unfreeze and turn back to his normal form.
Origin: Mario & Luigi: Partners in Time (2005)