Brainstorm

Omnitrix Access: Available/Normal 10

Brainstorm was first introduced in the episode Pier Pressure when Ben had to fight a Galvanic Mechomorph double named Ship (See character Roster). Ben first selected to transform into Jetray but it switched to Brainstrorm after the pier shook, which makes Brainstrorm the first accidental transformation in the series.

Planet and Species
Brainstorm is a Cerebrocrustacean (a play on "cerebrum" and "crustacean") from the planet Encephalonus IV (a play on "encepha-", a prefix referring to the brain). The skies of this planet are plagued by a never-ending thunderstorm, which is the main source of power on the planet.

Weaknesses
In the episode "Good Copy, Bad Copy" Albedo turned into Echo Echo and Ben turned into Brainstorm. Echo Echo's sonic blasts gave Brainstorm a headache.Also the species tends to be egomaniacal which makes them forget how to do simple things as seen in Vengeance of Vilgax where Brainstorm forgot to capture a wild Spidermonkey due to its cocky attitude