Elf Trader: My trump card is the Light/Dark Mantis.

Jiang Gu travels to the Pokémon world, is taken in by Xiao Lan, and becomes a Pokémon trader.
However, since he possesses the Pokémon Coexistence System, he doesn't sell starter Pokémon or pseudo-legendary Pokémon.
The Pokémon he produces here are from other worlds!
Lika: I was able to reach the top of the rankings thanks in no small part to Lisabubu. Her Leaf Beam's cleansing attribute makes it the same no matter who comes!
Dodo: Abu! Transform into the Holy Dragon!
Xiaoxia: Mega Seadramon, answer my expectations, Mega Evolution!
Giovanni: Polar Wardster, show your power!
……
Jiang Gu: **Arzetus the God? Holy Spirit King's Chart*? Royal Knights? Ace Team?
Jiang Gu: Holy King Sagros, Light's Punishment Incaros, get to work!!!