The developers have introduced several quality-of-life updates to modernize the experience:
Pokémon Reborn offers native support for XInput controllers (like Xbox controllers). For many, this feels more natural for a Pokémon game. pokemon reborn controls
While not a "button" control, understanding how to interact with the environment is a control mechanic in itself. pokemon reborn controls
The "Run" button. Hold this while moving to move faster. Once you obtain the Running Shoes, you can often toggle this in the options menu. Essential Hotkeys and Shortcuts pokemon reborn controls