"A"

Akumaito Kousen : When used, evil is found in the person’s heart. The evil then explodes. If used on a pure hearted person with no evil, like Goku, it won’t work.
Akuman

Amenbono Jyutsu: If special foot pads are worn, the person can walk on water. A ninja technique.
Murasaki

Anoyo kara no Shunkan Idou: Used only in the movies, the attacker can teleport between the after-life and Earth.
Goku

Arale Kick: A flying kick used by Arale chan.
Arale chan

Ashi kara Kamehameha: A Kamehameha shot from the feet.
Goku

Ayatsuri no Majyutsu: Ability to control anybody with evil in their hear.
Babidi