spoiler
Personally, I’m amazed how you can get so upset over something so trivial as this. Sure it’s true that Pyro Jack is a high level persona that, in accordance with the game, Yu shouldn’t have. But then again… This isn’t the game, and the sooner you realize that, the sooner things like this will stop bothering you. Besides, I don’t think the idea here was to “pander to Pyro Jack fans” with this… It’s more likely because he’s one of the Jack Brothers, and the most obvious choice in the situation (more on that later).
Anyway, you need to stop looking at this show like it has to follow the same mechanics as the game it’s based off of. This isn’t a game, it’s a TV show, and there are certain limitations that TV shows have that are absent in a video game.
You can’t expect the anime to be exactly like the game, it’s impossible. There’s a lot of story to be told in a very limited amount of time. If they stuck to the mechanics of the game for each and every little thing, then they wouldn’t be able to tell the story in the amount of time they’ve been given. And that’s what they’re doing here, they’re recreating the story that the game tells, they’re not recreating the game. If they have to change unimportant details in order to get points across, then so be it.
Game mechanics have to be changed in order to make up for the lack of time they have… It’s quite evident that Social Links play some part in the anime, but how much I’m not entirely sure yet. In the game the Main Character would have to fuse Personas, and he would have to be a particular level before being able to fuse certain personas. However, in the anime there isn’t enough time to be wasted on fusion, and there doesn’t appear to be any experience or leveling system in place, so rather than wasting time with all of that, Yu seems to be able to summon personas based on the Social Links that he has formed.
The purpose of him changing Personas here, is to show the audience that he is special, and therefore able to change Personas at will, while others are only able to use one Persona. In episode 2, he formed the Magician Social Link, therefore, if the above theory is correct, he can summon magician personas. Why did they choose Pyro Jack? Well that’s hard to say, but my guess would be that even though Shadow Chie’s weakness is WIND, Chie’s weakness is FIRE. Jiraiya can already cast WIND spells, so it would be pointless to summon another persona that casts WIND. However, they still need to emphasize the fact that Yu is not limited to only using Izanagi. So FIRE seems like the optimal choice in this situation… it eliminates the repetition of two Wind based Personas on the field, shows that Yu can summon different Personas, and using the FIRE elemental type is still slightly relevant since it’s Chie’s weakness… after all… they are both Chie.
So they’ve decided that Shadow Chie’s weakness is now FIRE… we need a Persona of the Magician Arcana that is fire based… Of all of the fire based Personas, Pyro Jack is the most appropriate choice here. Face it, Pyro Jack is one of the most memorable FIRE personas. Out of all of the other Personas they could have chosen (Orobas, Hua Po, Dis, Rangda, Jinn, Surt, Mada), they stuck with Pyro Jack because he’s memorable, he’s cool, and he’s popular.
I’m going to make a small prediction right now… I may be right, or I may be wrong, so here it goes:
As Yu forms more Social Links, he’s going to be able to summon Personas from the other Arcana. My guess is that Yu will Summon only ONE Persona from each Arcana. Izanagi from the Fool Arcana, and Pyro Jack from the Magician Arcana are what we have so far. With the inevitable formation of the Chariot Social Link, I’m curious which Persona Yu will summon… This is just a theory, and I could be proven wrong in the next episode!