[quote=AeronFarron]
Depends on the anime you are talking about. In most cases, it is a manga tradition so readers can understand what attack they are using. It is also something similar to when chess player call out their moves. You mostly see this in ki/energy based combat and card games. In a manga like...Claymore, I don't think they call out their attacks.In an anime context, certain moves are used as indicators so the shout out is for dramatic effect. Also...try to find a 20 year old person that has never heard of a Kamehameha wave. Hell, they may even act it out XD
[/quote]

still I think the shouting is unnecessary since there already are thought bubbles and internal monologues which tells the reader what is to come next. Like for example, Star Wars characters never shout the name of their force attacks despite how powerful they are, and Superman never says Heat Vision, he just uses it. Realistically, I don't think anyone would ever shout their attacks if they had special powers unless they were trying to be goofy or sound melodramatic. it just doesn't make sense in a dangerous situation, especially if you're fighting enemies that can move at insane speeds.