Aqua Jet may be a "gimmick" compared to Extremespeed. That is undeniable. However, this does not change the fact that Aqua Jet has various niches over Extremespeed, and I believe they are definitely worth considering as Shandera and Doryuuzu are two of the most threatening Pokémon in existence, and while Dragonite without Aqua Jet would beat both of them in a one-on-one battle, the chance of them encountering Dragonite in a situation in which its Multi-Scale ability is not active is far from impossible, and even putting Aqua Jet on Dragonite in various desperate situations (such as their weakened Shandera coming in against your weakened Dragonite to revenge-kill it with Hidden Power [Ice], or their Doryuuzu coming in against a Pokémon of yours in a Sandstorm, survives a hit while Swords Dancing, and then taking out that Pokémon. In such a situation, if your Dragonite's Multi-Scale is not active, Aqua Jet would be useful to revenge-kill the Doryuuzu which would otherwise sweep your team, as Extremespeed may not deal enough damage to revenge-kill it) is arguably considerable in my opinion due to how extremely common and threatening Shandera and Doryuuzu are.
That said, I definitely agree with the notion that Extremespeed is generally the better option.
As for Rain Dance teams, I use a Dragonite with Extremespeed (it used to be Aqua Jet, though now I think Extremespeed seems to be more useful), Hurricane, Surf and Thunder. It's excellent.
That said, I definitely agree with the notion that Extremespeed is generally the better option.
As for Rain Dance teams, I use a Dragonite with Extremespeed (it used to be Aqua Jet, though now I think Extremespeed seems to be more useful), Hurricane, Surf and Thunder. It's excellent.