A memorable one would have to be the one when Justin is willing to give up his wizard powers for Alex, saying that if she doesn't have powers, then he doesn't want to have them either, because Alex is the one who makes him a better wizard. Then they hug longingly and smile at each other.
The end of Eat to the Beat. Even though some may think Alex went too far, it's still adorable watching Justin chase her and see her run away screaming.
This line from the same episode, when Alex sees Justin doing his dance to the jazz music:
Alex:(to Stevie) You know, he's a dork, but if he wasn't around, I'd miss seeing stuff like that.
And now, the ending scene of Wizards Vs. Angels, where they share one of their famous hugs again.
At the end of the episode "Third Wheel", Harper takes the blame for destroying the school-funded parade float, despite Alex insisting she herself did it (both of them actually destroyed it). Mr. Laritate resolves this by punishing Harper and sending her to detention. When the girls meet up at the principal's office, Harper reveals that she didn't want Alex to get into trouble and that she still cares about her. Alex replies that she does not think of Harper as her friend, but as her sister. Harper is touched, and the two hug and say they love each other. Alex then climbs through the window into the room, so she can spend Harper's detention time with her. Aww!
"I'll always have my Harper." Which might also qualify as a Crowning Moment of Ho Yay.
In "Alex's Logo," when all the other students are mocking Alex, Mr. Laritate takes the heat off her by deliberately making a fool of himself in front of the students so they will mock him instead.
The ending of "Moving On" once the truth is revealed. Justin's still heartbroken over losing Juliet and Harper has had enough of seeing him like this. Since he's not moving on, she asks Alex to cast a spell on her to make her impersonate Juliet for long enough to convince Justin to start loving again. After a series of mishaps, Harper assures Justin that while he might never find a girl like Juliet again, he will find a girl he'll like and just needs to be open. Justin comes to agree, and kisses Harper on the cheek as thank you.
Then there's the credits scene. Justin has taken Harper's advice to heart and is on a date with a girl who was flirting with him earlier in the episode. As they have a good time, the real Juliet, old and all, is seen hiding in the bushes, watching the couple with a smile.
Theresa and Jerry's marriage. It's revealed in "Alex in the Middle" that he actually won the full wizard power in his family but when he fell in love with Theresa, he gave his powers up because he loved her so much and wizards can't marry non-wizards. Their relationship is actually extremely realistic towards actual marriages, despite being in a comedy.
When Max returned to his initial form, after he has been trapped into a little girl's body for quite long. He looks at the school's surroundings and mutters to himself it's good to be back....
Also, little before that, Max hugs each of his family members separately.
The Movie has lots and lots of these moments between them. Here are some:
Alex and Justin sitting by a fire, gazing at each other:
Alex: Justin, what if we don't get the stone in time and we can't save everyone?
Justin: Don't worry about it. We will.
Alex: How do you know that?
Justin: Because it's you and I. How can we not?
Also, in the same scene:
Alex: You're a great wizard, Justin.
Justin: I just know a bunch of spells. How does that make me great?
Alex: That isn't why I think you're great.You're always there for me, no matter how many times I screw up...
Justin: That doesn't make me great. That just makes me a good brother.
Alex: You know I don't say it very often...but thank you.
Justin: You're welcome.
Justin loses his memory and Alex starts crying. Then she spills her feelings, proving that she's not quite the manipulative Houdini we have all seen in the show:
Justin: Why would I help you?
Alex: ...Cause you're my brother... look, I'm sorry you didn't...
Justin: I'm your brother?
Alex: ...No, no... no, Justin... please, please, you can't leave me here, please remember... I'm Alex, I'm your little sister... I taunt you and I tease you and I make your life miserable, but you love me anyway... You're everything that I have ever wanted to be... I'm jealous of how, how smart you are and how kind and how nice... Please don't leave me here...
Justin: I'd never leave you. I don't know who you are... but... but I believe you. *They hug.*
When Max disappears, Theresa's scream is particularly heartbreaking. As is her later dialogue with Giselle.
Theresa: Look, I don't know what't going on. I'm not part of your world. I do know that I just got my heart ripped out by this boy that I didn't even know I knew, let alone loved. And his father, who may or may not be my husband. I wouldn't even mind if he was my husband. And these other two kids, these wonderful kids... Look it's a long story. But they need that stone, and I intend to get it.
Giselle: ...From what I could see, it didn't look like you and your daughter got along so well. There are a lot of moms who would like to be in your position.
Theresa: There isn't one!
And finally, when Alex wishes everything back to normal. The expression on her face when Theresa yells at her is heartwarming, and Alex hugs her. And when she realizes Justin and Max are back, runs to hug them, and then ends up arguing with Justin about the wizarding competition until Max goes "I'm right here," to which Alex responds "Yes you are, and I love you for that!" and glomps him.
In "Wizards Vs. Everything" when Juliet (who was revived and returned to her normal state somehow) reunites with Justin at long last, and they embrace.
Alex going back to Mr. Laritate to get a proper graduation.
In the Grand Finale, when the three Russo siblings took matters into their own hands and decided to run the sub shop themselves after Jerry decided to sell it. They were at first at each other's throats for having thought that they were disqualified from the wizard competition. Through a montage, they were shown working together and slowly softening up to one another, bringing their parents back as well.
Why is Mr. Latitate so hard on Alex and so soft on others? Some students don't need to be punished because they're good kids who know what they did was wrong and will never do it again, while others are pointless to punish because they simply don't understand what they did was wrong. Alex is neither of these things and he knows she has the potential to be a good person. Mr. Latitate keeps punishing her because he knows one day, she'll get it and be better for it.
In "The Wizards Return: Alex vs. Alex", after enduring immense crap for the entire special, including losing her powers, and then getting more crap from the Council and her father over her "responsibility" as the Family Wizard and "changing", Alex tells it straight forward that she's tired of being told to change just because she's the Family Wizard. She states that it was only Harper who told Alex she was amazing as who she is and stood by her through everything, even saying she's happy to not have her powers as she has Harper. This actually makes everyone apologize to Alex and touched by her confession, the Council gives her back her powers.
