It was probably removed because as written the example did not indicate he was injured at all before becoming more aggressive, which is a requirement of the trope. IDK about the second example; you need to describe it and can't assume people who would see you bringing it up would be familiar with it.
Also, apparently the removal happened 5 years ago; why get bothered about it bow?
SoundCloudBecause I have a good memory but no sense of time at all. The injury argument seems solid.
As for Araba example, he's a powerful dragon in a fantasy world that due to plot reasons runs on jrpg rules. He's already a formidable opponent, but once the protagonist manages to seriously injure him (temporarily - he has a lot of regeneration) he surpirises her by spending a ton of overdue skill points he had gathered for centuries, making a build specifically to counter her abilities.
That example sounds like a fit. In the future, though, you should ask in the Is This an Example? thread.
SoundCloud
The "Turns Red" trope has an 'other' category, which does contain non-videogame examples.
But recently I discovered that an anime example I had put there has been removed (Warden Magellan from One Piece - the trope was also removed from his character bio in One Piece characters) Was it so wrong to include him?
And if he isn't video-gamey enough, would Araba from "I'm a spider, so what?" qualify?