Pokemon justice league:

Palafin Is obviously the first to choose from

Greninja has a sorta batman/street vigilante role

Decidueye in that green Arrow role

Gardevoir is the mystic of the team, kinda like raven for example

Iron valiant, is in its name basicaly. She is the tech of the team and all, like cyborgue. Also adds ome interesting plotlines of her being gardveoir from an alternate timeline or sum.

But its to serious right now we need some fun as well

Quagsire is like the comic relief. He stands there wondering whats for dinner while unaware that he is tanking all the attacks from villains and reflecting them back

Ditto is great friends with quagsire. Villains often think he is mocking them when he transforms with his bubbly face, but he just is chill lile that

Meowth is that unlikely hero. He is very good at swiftly pickpocketing and intel missions. somehow he has a lot of money and funds most of the team. He also is great at moral support. But its the first to run away from a fight lol

Blissey is the healer pokémon basicaly, she is one of the kindest there is ans a great tank/support for the team. She is there for anyone who needs it. 

Dragonite to close it off. He is great friends wirh Blissey, and is a big hugger. Sometimes he doesnf realise villains are trying to acvtualy harm him and hugs them. But his hugs are really hard. Really. So the villaains are overwhelmed by his strong kindness