Disarray

Right before the wish is made, Nikki directly asks Bear if he likes her, and Bear fumbles and tells her that they are friends. This would not be the case with Donnie. We're shown in The Invasion that when he thinks he has the opportunity to say something, he goes for it. The difference between these scenarios is that Nikki asks Bear directly, while April intentionally prevents him from saying anything about it.

In April's exact words, "You should stop talking."

If April directly asked Donnie how he felt about her, the canon supports that Donnie would just be honest about his feelings, because he isn't trying to hide anything- he's not talking about it because he thinks (then knows) April wouldn't/doesn't want them to discuss it.

The only time that he does bring it up again is in Foot Too Big, when he's apologizing to her. (Keep a pin in that. We move on.)

So let's say that he does get very nervous and fumbles the ball- would he make the wish? Yeah. I think he would. He tends to act out when his emotions are high, and I believe he would blurt something like "I wish April would love me the way that I love her." I do NOT think he would wish that April would love him "more than anyone in the whole world."

This movie is centered around a male predator who intentionally ignores a female's boundaries and autonomy to claim the female as his own. His wish was worded in that specific way because- as the movie shows- he doesn't like Nikki. He likes the idea of having her.

Donnie starts out with a crush on April, but at no point during the series does he claim ownership of her. And no, that one time that he fumbles and says "my April" "our April" "April" was not some subconscious revelation- it was a kid with a crush saying something inappropriate, realizing he said something inappropriate, and then correcting himself to fix the inappropriate.

He learns to know her, "she always answers the phone!" "April's usually at the park around this time," but he never pretends that she belongs to him. Whatever she decided to do during the series, he always supported that. Ever notice how Donnie's never depicted, even hinting that she should stop tutoring Casey?

Casey gets a whole conversation with Raph about how he has to back off of April because Donnie likes him. No one tells April how to feel.

And when she decides to become a kunoichi, Donnie's all for it. He never attempts to stop her because it might be dangerous. No attempt at control or persuasion. Just support. "It's amazing you made it to kunoichi, April. Ignore everything Raph just said."

When April told them that they can trust Karai, Donnie (who notoriously doesn't trust Karai) doubtfully says, "I trust... April." And doesn't say anything against them bringing her home.

He fights Casey around her, but when she makes a verdict, he respects it. Donnie never even tells her that she's wrong for blacklisting his entire family because of an accident that they are currently trying to repair. Upon 'losing' her for the second time, he leaves and goes home.

Bear's wish is a reflection of how he desired her to lose her autonomy by making all her love be centered around him. Donnie wants to be in a relationship with her, but he wants her to want it too. He doesn't want to own her. He just wants her to see him as more than a mutant.

I think he'd wish that she'd love him in his lowest moment. I don't think he'd wish that all her love (ergo, autonomy) would belong to him.

April is actually a super independent female character in the series because all of the brothers respect her autonomy as a person. There's never a point in the series where any of them try to tell her what she can or can't do. In Metalhead, when April wants to hunt the Kraang alone, Leo warns her that it "could be dangerous,'' and she warns him that it's more dangerous for him to be getting in between her and her dad, so he puts up his hands and steps away to let her go.

Canonly, Donnie has never tried to take her autonomy. When he thinks that he might be because of what Raph says, "now you know how April feels" in the events of A Foot Too Big, he goes to her and says that he's going to back off from her now. He understands what he's been doing and how it could be affecting her. He intends to stop.

Then April kisses him. And walks away.

Which is an incredibly confusing response for a boy who just bared his heart and said that he was going to back off because he guessed she wasn't interested. To then be shown that she has interest.

How on earth would you respond to that?

Another point that I would like to make, is Bear actively ignoring all of the harm that is happening to Nikki. All the crying fits, all the abnormal acts, he watches them happen and moves on.

There is no universe where Donnie does that. Donnie has acted as April's shoulder to lean on through the entire series. When she's freaking out in Fungus Humongous, his first instinct is to soothingly crouch beside her and tell her that she's okay. Out of all the brothers, he's the first person that she calls when she's in trouble, because she knows that he's going to show up. In City At War, when April's pulling out her blade and about to lose control, it's Donnie crouching next to her and gently telling her "not to let that weirdo get to you" which pulls her out of her psychic insanity funk and calms her down.

Donnie cares so, so, so much about her being happy and safe. He would not sit back and let any of this play out. The SECOND that she shows adverse signs, he's going to go out of his way to fix whatever it is that he did. In Bat in the Belfry, April goes to Donnie about her headaches and weird visions, and he tries to find a way to stop them. It shows that he's noticing every time that she acts off with the crystal. The Power Inside Her begins with Donnie trying to figure out what the crystal is doing because the vibes are off. He wants to figure out why and how to stop it in case it becomes bad for her/others.

Donnie wants the crystal to figure it out, but he never stops her from taking/keeping it when she wants it because he respects her and the fact that it belongs to her. He respects her autonomy to have it until it makes her go crazy, and she destroys the lab.

Then he steps in to separate them.

Even after she destroys the dojo/lair, Donnie chases her up a building alone. He doesn't care what happens to him if it means she's okay.

In the movie, he might buy some of her reasons, "I'm only emotional because of my dad," because he trusts her wholeheartedly, but as soon as she does the first whacked-out thing (memorial of the cat-esc crazy), he's going to know something's wrong, and he's going to start trying to figure out what it is.

He's going to have vibes that something is wrong from the get-go, and a restaurant-esc scene would immediately spur him to start acting. There's no universe where he sees her make a scene like that and learns that she lied to him and doesn't know that she's not acting like herself. That would be the point that he starts trying to figure out what the HECK is wrong with her and (very likely) blaming himself for it, which would only make him want to fix it more.

The scene where she's in bed and asking him to kill her to free her? There would be no "What's so bad about being with me?" He'd be sprinting back to her to promise that he's going to fix this and free her. During the show, he has nothing but her best interests at heart, and the SECOND that she reveals that she actually doesn't like this? That would be all it takes for him to know that it's wrong. That it has to be undone.

I think upon learning that he has to kill himself, he'd be like "no there has to be another way" because normal people don't want to die, and thankfully, his brothers are not useless people like Ian, and probably would wish for the wish to go away, which would fix everything.

Then we'd have a A Foot Too Big-esc scene at the end where Donnie apologizes to April for making the wish in the first place, because that's just the kind of person that the canon shows him to be.

To Summarize: