I'm making a 2.5D game and I need some general advice to get started

Hi. I wanted to make a 2d game that the overworld functions like pokemon games, but I found the idea a little boring and wanted a little more of a stepping stone to 3d, so I decided to make it 2.5D like in Gen five of Pokémon.
There isn’t much tutorials on 2.5D top-down games, so I thought I would ask for a bit of advice of what to look into.
So could you guys suggest techniques or programming concepts I should read into to make this game? I welcome different suggestions to address the same aspects because I want to experiment as much as possible.

Make a 3D game with billboarded Sprite3Ds for your characters. For programming use 3D mathematics and Node3Ds.

Thanks, I hadn’t heard the term Billboard sprites yet. But more is appreciate like parallax scrolling, or using a 3D grid for level design. And maybe specify when I should use the code or the built in creative functions to achieve better affect.

Parallax is something you do in 2D to create the illusion of distant object moving slower than near ones. If your game is actually 3D but with 2d sprites for characters, you don’t need to fake parallax because a perspective camera will do it automatically.

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