[Scripting Question] Allowing Bicycle to ride on water (Rotom Bike)

Yeah i'm actually looking for a Bicycle Script that will allow the player to ride on water like in Gen 8, I have a bike ready for it, in my game Pokemon Helenite it's known as the Aqua Bike, but in Gen 8 it's known as the Rotom Bike (Water Mode), is there a script already made for that?

Nope. No script like has been made.

If you don't need to have HM-Surf in your game, you can just add the surf HM-Item from the link below and edit the surf overworlds om your game to be the Rotom Water Bike Overworld.

https://www.pokecommunity.com/showthread.php?t=429034

Or you can edit the surf tile terrain tag to allow you to travel on it with bike, you can even add a condition check to see if you are on surf tile while riding the bike and change overworld to water bike on that basis.