When this card is Normal or Special Summoned: You can target 1 card in your opponent's Graveyard; place it on either the top or bottom of their Deck. You can only use this effect of "Wattsychic Fighter" once per turn.
What do you mean? Nowadays on summon effects is better than having ignition once per turn effects despite can be used multiple times because your opponent may disrupt you with trap hole or other removal traps such as raigeki break or karma cut before you can activate its effects. Also this card basically raiza without tributing despite having GY removal instead of field removal.
This card's name is what happens when OCG decided to make a wordplay out of nowhere to troll TCG.
(This card is a "Watt" because the Japanese name for "Watt" is "Eleki", and this card is "Elechic Fighter", with "Elechic" being "Electric" + "Psychic", but when written in Japanese language, "Elechic" has the same writing as "Elekick", thus it contains "Eleki", making it a "Watt" monster in TCG. That's why this card's name sounds weird in TCG.)