The Pokémon Trainer is one of the most notable protagonists from the series packed with one of the most notable Pokémon in the series, and the Squirtle and Ivysaur are necessary for the gimmick. They are exceptions to the whole mascot thing, but the Pokémon Trainer itself is one of the most important characters in the entire series. It'd be weird not to include him.
No but the Pokémon has to be one that The Pokémon Company is going to promote for the rest of the generation. They've done nothing with Toxtricity so far.
If I'm wrong, great! We get something that's actually interesting...But the chances for something that isn't the hot new starter are incredibly slim.
"They're old so it's ok" is a terrible argument. That doesn't change the fact that they made up pretty much the entire moveset for these characters.
Pheonix Wright has two modes: one representing his investigation part, and the other the trial part of each case.
Investigation mode:
- "M-Maya!?" (Light): Calling on Maya's spirit medium powers.
- "M-Maya!?" (Medium/Heavy): A made up attack using Maya's personality.
- Neither attack is out of character, as Maya is Phoenix Wright's right hand woman, and she helps quite a lot on cases. Especially during investigation.
- Investigate: Literally half the core gameplay loop.
- Discard: Throws away evidence that has been deemed irrelevant, which happens in every single trial. This is just the attack version of it, and likely where his chicken throw comes from.
- Mode Change: Made up, but the moveset wouldn't have the extra mode without it.
Trial mode:
- Paperwork (High/Low): Looking through court records and the like is a common thing in trials.
- Press the Witness (Light/Medium/Heavy): Literally the entire gameplay loop of the trial section.
- Present Evidence: This is how you call contradictions. It's a bit random that they shoot beams of light, but that's just kind of the nature of Marvel Vs. Capcom.
And then when you get enough evidence you can enter turnabout mode (With an Objection no less), which is what happens when you finally get that final piece of evidence against the witness in the main games. All of these attacks are the trial mode attacks on steroids. You nailed 'em.
Then his Supers:
- Steel Samurai Maya Smelting: A made up attack based upon Maya's personality.
- "Order in the Court!": The Judge makes the verdict on a lot of things, which can screw over either party. It fits really well in this way.
- Ace Attorney: Captures the entirety of the Phoenix Wright series in just one move.
There are creative liberties, but I'd say he's just as spot on as a character like Villager.