People want Garchomp, people want Salamence, people want Dragonite, people want Charizard, people want Flygon.
Let’s get this straight, Dragon Pokemon are by far the strongest type and if they were ever released there’d be nothing but Dragons running around including peer pressure to force many people to use them as well. A Dragon-type would pummel a Dungeon, would pummel the Arena and is well put to destroy absolutely everything. There’s a good reason Dragons are not released for years, PMD is where every Pokemon can shine but Dragons will still steal all the spotlight. Someone may happen to say they’d never use Dragons but see them around so much they too may even begin to use the Dragon. Simply put Dragons are very powerful and they take over the competitive game, there is a good reason they are not released and should not be released before any other Pokemon. Like Unova starter evolutions the Dragons will have to wait big time. They could even be bloody nerfed. The point is that if Dragons like the above mentioned were to be released a lot of people would flood all over them like Jinxatu stated. “A lot of Dragon type lovers” is the perfect example for this. Notice how for starters people may choose Charizard very often, etc etc. Dragons have a very well chance of taking over Pokemon popularity. I am afraid I disagree completely with this.
Furthermore, unlike Pokemon Mystery Dungeon, this one has all the TMs, it’s like a trainer game except Pokemon are their own trainers. All your stats are to the max, you aren’t a weakling like the PMD game, PMU is the actual thing where all stats are neutrally maxed without any Natures, so yes, Dragons will be powerful as usual and there are rare counters to them.
Finally, transferring is also a flaw in that I could simply make a bunch of new accounts give myself the starters and bam, I have all the starters and possibly even Event Pokemon I never got on said Alt.