Delinquent Justin

Justin is graduating from high school, and as graduation gift Alex reveals that she duplicated Justin and sent him off to college so Justin wouldn't have to go. At first Justin is angry, but then he begins warming up to the idea. But when the Duplication comes back to Waverly place so Alex can merge the two together, he is revealed to be laid back hippie who has no sense of responsibility. After Alex merges the two Justins together, Justin doesn't only get the Duplicates knowledge but his personality as well. And to make matters worse this New Justin plans on ruining the Old Justin's valedictorian speech in an effort to get back at the Old Justin. Alex magically takes all the Duplicate's knowledge away from Justin, but this gives him the personality of a 7 year old. Justin then tries to do his speech but makes an idiot of himself, forcing Alex to take over and force him off the stage. At the the end of the episode, Alex manages to fix everything, even managing to give Justin the college Justin's knowledge without the new personality

Spells

Through in vain back way, turns Justin back out - Switches Justin's personality with somebody.

Retriven Striven - Undoes the exchange personality spell.

Link Part 3: http://www.youtube.com/watch?v=pLeg8YIm3Dc <- Contains Spell

Link Part 2: http://www.youtube.com/watch?v=iFKUipSyOMQ&feature=channel <- Contains Spell

Link Part 1: http://www.youtube.com/watch?v=5J3i0SYpwIU&feature=channel <- Contains No Spell