He has a legal basis for a suit (Score 2)

Uri Gellar has a right to sue Nintendo of Japan. Everyone of the Pokémon names is trademarked (at least here in the U.S.), and the fact that the Pokémon is named Ungellar in Japanese obviously isn't coincidental. As has been previously stated, the katakana glyphs for Ri and N are strikingly similar. It can therefore be determined that Nintendo's name 'Ungellar' was a play on Uri Gellar's name. Mr. Gellar obviously would have a winning suit if not for the international complications.

Gellar cannot sue Nintendo of America - that Pokémon is called Alakazam here and a simple "He bends spoons too!" suit would not hold up in a civil court. The only way for Gellar to get money would be to sue Nintendo of Japan, and then you obviously have international trademark and copyright law coming into play with every one of the Pokémon names being trademarked (at least in the U.S.)

With all the difficulties that are inherent of an international suit, I doubt that he'll get the money, even though he probably deserves it.